857891404 has 12 divisors (see below), whose sum is σ = 1502314128. Its totient is φ = 428658800.

The previous prime is 857891393. The next prime is 857891431. The reversal of 857891404 is 404198758.

It is a super-2 number, since 2×857891404² = 1471955322114182432, which contains 22 as substring.

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, 64927 + ... + 77014.

It is an arithmetic number, because the mean of its divisors is an integer number (125192844).

Almost surely, 2^857891404 is an apocalyptic number.

It is an amenable number.

857891404 is a deficient number, since it is larger than the sum of its proper divisors (644422724).

857891404 is a wasteful number, since it uses less digits than its factorization.

857891404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143456 (or 143454 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 857891404 is about 29289.7832699390. The cubic root of 857891404 is about 950.1906926525.

The spelling of 857891404 in words is "eight hundred fifty-seven million, eight hundred ninety-one thousand, four hundred four".