856520384 has 28 divisors (see below), whose sum is σ = 1799639784. Its totient is φ = 403067904.

The previous prime is 856520377. The next prime is 856520393. The reversal of 856520384 is 483025658.

It is a hoax number, since the sum of its digits (41) 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 3 ways as a sum of consecutive naturals, for example, 392534 + ... + 394709.

Almost surely, 2^856520384 is an apocalyptic number.

It is an amenable number.

856520384 is an abundant number, since it is smaller than the sum of its proper divisors (943119400).

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

856520384 is a wasteful number, since it uses less digits than its factorization.

856520384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787272 (or 787262 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 856520384 is about 29266.3695049454. The cubic root of 856520384 is about 949.6842474192.

The spelling of 856520384 in words is "eight hundred fifty-six million, five hundred twenty thousand, three hundred eighty-four".