857440944 has 40 divisors (see below), whose sum is σ = 2461174320. Its totient is φ = 285813504.

The previous prime is 857440939. The next prime is 857440993. The reversal of 857440944 is 449044758.

It is a super-2 number, since 2×857440944² = 1470409944895222272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 857440944.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991977 + ... + 992840.

It is an arithmetic number, because the mean of its divisors is an integer number (61529358).

Almost surely, 2^857440944 is an apocalyptic number.

It is an amenable number.

857440944 is an abundant number, since it is smaller than the sum of its proper divisors (1603733376).

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

857440944 is a wasteful number, since it uses less digits than its factorization.

857440944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984834 (or 1984822 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 857440944 is about 29282.0925481769. The cubic root of 857440944 is about 950.0243554236.

The spelling of 857440944 in words is "eight hundred fifty-seven million, four hundred forty thousand, nine hundred forty-four".