857931930 has 48 divisors (see below), whose sum is σ = 2232087624. Its totient is φ = 228631680.

The previous prime is 857931917. The next prime is 857931953. The reversal of 857931930 is 39139758.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 585978849 + 271953081 = 24207^2 + 16491^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234072 + ... + 237708.

Almost surely, 2^857931930 is an apocalyptic number.

857931930 is an abundant number, since it is smaller than the sum of its proper divisors (1374155694).

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

857931930 is a wasteful number, since it uses less digits than its factorization.

857931930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6271 (or 6268 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 857931930 is about 29290.4750729653. The cubic root of 857931930 is about 950.2056544613.

The spelling of 857931930 in words is "eight hundred fifty-seven million, nine hundred thirty-one thousand, nine hundred thirty".