857206964 has 24 divisors (see below), whose sum is σ = 1647723840. Its totient is φ = 388390464.

The previous prime is 857206951. The next prime is 857206993. The reversal of 857206964 is 469602758.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243449 + ... + 246944.

It is an arithmetic number, because the mean of its divisors is an integer number (68655160).

Almost surely, 2^857206964 is an apocalyptic number.

It is an amenable number.

857206964 is a deficient number, since it is larger than the sum of its proper divisors (790516876).

857206964 is a wasteful number, since it uses less digits than its factorization.

857206964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490439 (or 490437 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 857206964 is about 29278.0970010006. The cubic root of 857206964 is about 949.9379327871.

The spelling of 857206964 in words is "eight hundred fifty-seven million, two hundred six thousand, nine hundred sixty-four".