Search a number
-
+
384820225 = 5215392809
BaseRepresentation
bin10110111011111…
…110010000000001
3222211002220002221
4112323332100001
51242003221400
6102104011041
712351626566
oct2673762001
9884086087
10384820225
11188248149
12a8a60a81
136195819a
143917286d
1523bb5c1a
hex16efe401

384820225 has 6 divisors (see below), whose sum is σ = 477177110. Its totient is φ = 307856160.

The previous prime is 384820223. The next prime is 384820231. The reversal of 384820225 is 522028483.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 67125249 + 317694976 = 8193^2 + 17824^2 .

It is not a de Polignac number, because 384820225 - 21 = 384820223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (384820223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7696380 + ... + 7696429.

Almost surely, 2384820225 is an apocalyptic number.

It is an amenable number.

384820225 is a deficient number, since it is larger than the sum of its proper divisors (92356885).

384820225 is a wasteful number, since it uses less digits than its factorization.

384820225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15392819 (or 15392814 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 384820225 is about 19616.8352442488. The cubic root of 384820225 is about 727.3653856730.

The spelling of 384820225 in words is "three hundred eighty-four million, eight hundred twenty thousand, two hundred twenty-five".

Divisors: 1 5 25 15392809 76964045 384820225