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38000000 = 275619
BaseRepresentation
bin1001000011110…
…1010110000000
32122111121012102
42100331112000
534212000000
63434245532
7640665113
oct220752600
978447172
1038000000
111a4a4a65
12108868a8
137b4640c
14509257a
1535093d5
hex243d580

38000000 has 112 divisors (see below), whose sum is σ = 99608100. Its totient is φ = 14400000.

The previous prime is 37999991. The next prime is 38000009. The reversal of 38000000 is 83.

Adding to 38000000 its reverse (83), we get a palindrome (38000083).

It is an interprime number because it is at equal distance from previous prime (37999991) and next prime (38000009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38000009) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1999991 + ... + 2000009.

Almost surely, 238000000 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 38000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49804050).

38000000 is an abundant number, since it is smaller than the sum of its proper divisors (61608100).

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

38000000 is an frugal number, since it uses more digits than its factorization.

38000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 26 counting only the distinct ones).

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

The square root of 38000000 is about 6164.4140029690. The cubic root of 38000000 is about 336.1975406799.

The spelling of 38000000 in words is "thirty-eight million", and thus it is an aban number and an uban number.

Divisors: 1 2 4 5 8 10 16 19 20 25 32 38 40 50 64 76 80 95 100 125 128 152 160 190 200 250 304 320 380 400 475 500 608 625 640 760 800 950 1000 1216 1250 1520 1600 1900 2000 2375 2432 2500 3040 3125 3200 3800 4000 4750 5000 6080 6250 7600 8000 9500 10000 11875 12160 12500 15200 15625 16000 19000 20000 23750 25000 30400 31250 38000 40000 47500 50000 59375 60800 62500 76000 80000 95000 100000 118750 125000 152000 190000 200000 237500 250000 296875 304000 380000 400000 475000 500000 593750 760000 950000 1000000 1187500 1520000 1900000 2000000 2375000 3800000 4750000 7600000 9500000 19000000 38000000