385256556 has 36 divisors (see below), whose sum is σ = 994567392. Its totient is φ = 125685984.

The previous prime is 385256539. The next prime is 385256587. The reversal of 385256556 is 655652583.

385256556 is a `hidden beast` number, since 3 + 85 + 2 + 565 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×385256556² = 296845227881962272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112155 + ... + 115538.

It is an arithmetic number, because the mean of its divisors is an integer number (27626872).

Almost surely, 2^385256556 is an apocalyptic number.

385256556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

385256556 is an abundant number, since it is smaller than the sum of its proper divisors (609310836).

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

385256556 is a wasteful number, since it uses less digits than its factorization.

385256556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227750 (or 227745 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The square root of 385256556 is about 19627.9534338147. The cubic root of 385256556 is about 727.6401912138.

The spelling of 385256556 in words is "three hundred eighty-five million, two hundred fifty-six thousand, five hundred fifty-six".