869857944 has 16 divisors (see below), whose sum is σ = 2174644920. Its totient is φ = 289952640.

The previous prime is 869857909. The next prime is 869857957. The reversal of 869857944 is 449758968.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18122017 + ... + 18122064.

Almost surely, 2^869857944 is an apocalyptic number.

It is an amenable number.

869857944 is an abundant number, since it is smaller than the sum of its proper divisors (1304786976).

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

869857944 is a wasteful number, since it uses less digits than its factorization.

869857944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36244090 (or 36244086 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The square root of 869857944 is about 29493.3542344712. The cubic root of 869857944 is about 954.5883093421.

The spelling of 869857944 in words is "eight hundred sixty-nine million, eight hundred fifty-seven thousand, nine hundred forty-four".