385231556 has 12 divisors (see below), whose sum is σ = 678053292. Its totient is φ = 191502048.

The previous prime is 385231549. The next prime is 385231573. The reversal of 385231556 is 655132583.

It can be written as a sum of positive squares in 2 ways, for example, as 141372100 + 243859456 = 11890^2 + 15616^2 .

It is a super-2 number, since 2×385231556² = 296806703476362272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277655 + ... + 279038.

It is an arithmetic number, because the mean of its divisors is an integer number (56504441).

Almost surely, 2^385231556 is an apocalyptic number.

It is an amenable number.

385231556 is a deficient number, since it is larger than the sum of its proper divisors (292821736).

385231556 is a wasteful number, since it uses less digits than its factorization.

385231556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556870 (or 556868 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 385231556 is about 19627.3165766490. The cubic root of 385231556 is about 727.6244515740.

The spelling of 385231556 in words is "three hundred eighty-five million, two hundred thirty-one thousand, five hundred fifty-six".