857078984 has 32 divisors (see below), whose sum is σ = 1632623520. Its totient is φ = 421739136.

The previous prime is 857078977. The next prime is 857078993. The reversal of 857078984 is 489870758.

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, 318107 + ... + 320789.

It is an arithmetic number, because the mean of its divisors is an integer number (51019485).

Almost surely, 2^857078984 is an apocalyptic number.

It is an amenable number.

857078984 is a deficient number, since it is larger than the sum of its proper divisors (775544536).

857078984 is a wasteful number, since it uses less digits than its factorization.

857078984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309 (or 3305 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 56.

The square root of 857078984 is about 29275.9113265497. The cubic root of 857078984 is about 949.8906555590.

The spelling of 857078984 in words is "eight hundred fifty-seven million, seventy-eight thousand, nine hundred eighty-four".