857992900 has 18 divisors (see below), whose sum is σ = 1861844810. Its totient is φ = 343197120.

The previous prime is 857992867. The next prime is 857992913. The reversal of 857992900 is 9299758.

It can be written as a sum of positive squares in 3 ways, for example, as 2079364 + 855913536 = 1442^2 + 29256^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4289865 + ... + 4290064.

Almost surely, 2^857992900 is an apocalyptic number.

It is an amenable number.

857992900 is an abundant number, since it is smaller than the sum of its proper divisors (1003851910).

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

857992900 is a wasteful number, since it uses less digits than its factorization.

857992900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8579943 (or 8579936 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 857992900 is about 29291.5158365012. The cubic root of 857992900 is about 950.2281631105.

The spelling of 857992900 in words is "eight hundred fifty-seven million, nine hundred ninety-two thousand, nine hundred".