857444364 has 72 divisors (see below), whose sum is σ = 2544036768. Its totient is φ = 238360320.

The previous prime is 857444333. The next prime is 857444377. The reversal of 857444364 is 463444758.

857444364 is a `hidden beast` number, since 8 + 574 + 44 + 36 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36657 + ... + 55304.

It is an arithmetic number, because the mean of its divisors is an integer number (35333844).

Almost surely, 2^857444364 is an apocalyptic number.

857444364 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

857444364 is an abundant number, since it is smaller than the sum of its proper divisors (1686592404).

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

857444364 is a wasteful number, since it uses less digits than its factorization.

857444364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92015 (or 92010 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 45.

The square root of 857444364 is about 29282.1509455846. The cubic root of 857444364 is about 950.0256185151.

The spelling of 857444364 in words is "eight hundred fifty-seven million, four hundred forty-four thousand, three hundred sixty-four".