381865584 has 40 divisors (see below), whose sum is σ = 988035472. Its totient is φ = 127088640.

The previous prime is 381865537. The next prime is 381865597. The reversal of 381865584 is 485568183.

It is a super-2 number, since 2×381865584² = 291642648487322112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 26394 + ... + 38214.

Almost surely, 2^381865584 is an apocalyptic number.

It is an amenable number.

381865584 is an abundant number, since it is smaller than the sum of its proper divisors (606169888).

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

381865584 is a wasteful number, since it uses less digits than its factorization.

381865584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12505 (or 12499 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The square root of 381865584 is about 19541.3813227213. The cubic root of 381865584 is about 725.4990358910.

The spelling of 381865584 in words is "three hundred eighty-one million, eight hundred sixty-five thousand, five hundred eighty-four".