388704540 has 48 divisors (see below), whose sum is σ = 1243855872. Its totient is φ = 88846656.

The previous prime is 388704529. The next prime is 388704551. The reversal of 388704540 is 45407883.

It is an interprime number because it is at equal distance from previous prime (388704529) and next prime (388704551).

It is a super-2 number, since 2×388704540² = 302182438833223200, 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 15 ways as a sum of consecutive naturals, for example, 462324 + ... + 463163.

It is an arithmetic number, because the mean of its divisors is an integer number (25913664).

Almost surely, 2^388704540 is an apocalyptic number.

388704540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388704540 is an abundant number, since it is smaller than the sum of its proper divisors (855151332).

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

388704540 is a wasteful number, since it uses less digits than its factorization.

388704540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925506 (or 925504 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 388704540 is about 19715.5912921728. The cubic root of 388704540 is about 729.8045013488.

The spelling of 388704540 in words is "three hundred eighty-eight million, seven hundred four thousand, five hundred forty".