385503864 has 32 divisors (see below), whose sum is σ = 964379520. Its totient is φ = 128418656.

The previous prime is 385503857. The next prime is 385503919. The reversal of 385503864 is 468305583.

It is a super-2 number, since 2×385503864² = 297226458317860992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41557 + ... + 49979.

It is an arithmetic number, because the mean of its divisors is an integer number (30136860).

Almost surely, 2^385503864 is an apocalyptic number.

It is an amenable number.

385503864 is an abundant number, since it is smaller than the sum of its proper divisors (578875656).

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

385503864 is a wasteful number, since it uses less digits than its factorization.

385503864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339 (or 10335 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 385503864 is about 19634.2523157873. The cubic root of 385503864 is about 727.7958560956.

The spelling of 385503864 in words is "three hundred eighty-five million, five hundred three thousand, eight hundred sixty-four".