856239538 has 32 divisors (see below), whose sum is σ = 1670906880. Its totient is φ = 319094160.

The previous prime is 856239511. The next prime is 856239569. The reversal of 856239538 is 835932658.

It is a super-2 number, since 2×856239538² = 1466292292868906888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 856239491 and 856239500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117328 + ... + 124411.

It is an arithmetic number, because the mean of its divisors is an integer number (52215840).

Almost surely, 2^856239538 is an apocalyptic number.

856239538 is a deficient number, since it is larger than the sum of its proper divisors (814667342).

856239538 is a wasteful number, since it uses less digits than its factorization.

856239538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241782.

The product of its digits is 1555200, while the sum is 49.

The square root of 856239538 is about 29261.5710104567. The cubic root of 856239538 is about 949.5804381837.

The spelling of 856239538 in words is "eight hundred fifty-six million, two hundred thirty-nine thousand, five hundred thirty-eight".