388736220 has 24 divisors (see below), whose sum is σ = 1088461584. Its totient is φ = 103662976.

The previous prime is 388736209. The next prime is 388736233. The reversal of 388736220 is 22637883.

It is a happy number.

It is a super-2 number, since 2×388736220² = 302231697479776800, 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, 3239409 + ... + 3239528.

It is an arithmetic number, because the mean of its divisors is an integer number (45352566).

Almost surely, 2^388736220 is an apocalyptic number.

388736220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388736220 is an abundant number, since it is smaller than the sum of its proper divisors (699725364).

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

388736220 is a wasteful number, since it uses less digits than its factorization.

388736220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478949 (or 6478947 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 388736220 is about 19716.3947008575. The cubic root of 388736220 is about 729.8243275288.

The spelling of 388736220 in words is "three hundred eighty-eight million, seven hundred thirty-six thousand, two hundred twenty".