Search a number
-
+
380000000 = 285719
BaseRepresentation
bin10110101001100…
…101011100000000
3222111001000000002
4112221211130000
51234240000000
6101412415132
712262642502
oct2651453400
9874030002
10380000000
11185555696
12a73174a8
136095b193
1438679d72
15235628d5
hex16a65700

380000000 has 144 divisors (see below), whose sum is σ = 998044320. Its totient is φ = 144000000.

The previous prime is 379999999. The next prime is 380000009. The reversal of 380000000 is 83.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380000009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19999991 + ... + 20000009.

Almost surely, 2380000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 380000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (499022160).

380000000 is an abundant number, since it is smaller than the sum of its proper divisors (618044320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

380000000 is an frugal number, since it uses more digits than its factorization.

380000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 380000000 is about 19493.5886896179. The cubic root of 380000000 is about 724.3156443442.

Adding to 380000000 its reverse (83), we get a palindrome (380000083).

The spelling of 380000000 in words is "three hundred eighty million", and thus it is an aban number.

Divisors: 1 2 4 5 8 10 16 19 20 25 32 38 40 50 64 76 80 95 100 125 128 152 160 190 200 250 256 304 320 380 400 475 500 608 625 640 760 800 950 1000 1216 1250 1280 1520 1600 1900 2000 2375 2432 2500 3040 3125 3200 3800 4000 4750 4864 5000 6080 6250 6400 7600 8000 9500 10000 11875 12160 12500 15200 15625 16000 19000 20000 23750 24320 25000 30400 31250 32000 38000 40000 47500 50000 59375 60800 62500 76000 78125 80000 95000 100000 118750 121600 125000 152000 156250 160000 190000 200000 237500 250000 296875 304000 312500 380000 400000 475000 500000 593750 608000 625000 760000 800000 950000 1000000 1187500 1250000 1484375 1520000 1900000 2000000 2375000 2500000 2968750 3040000 3800000 4000000 4750000 5000000 5937500 7600000 9500000 10000000 11875000 15200000 19000000 20000000 23750000 38000000 47500000 76000000 95000000 190000000 380000000