388389280 has 48 divisors (see below), whose sum is σ = 929214720. Its totient is φ = 153384192.

The previous prime is 388389277. The next prime is 388389283. The reversal of 388389280 is 82983883.

It is an interprime number because it is at equal distance from previous prime (388389277) and next prime (388389283).

It is not an unprimeable number, because it can be changed into a prime (388389283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2724 + ... + 28003.

It is an arithmetic number, because the mean of its divisors is an integer number (19358640).

Almost surely, 2^388389280 is an apocalyptic number.

It is an amenable number.

388389280 is an abundant number, since it is smaller than the sum of its proper divisors (540825440).

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

388389280 is a wasteful number, since it uses less digits than its factorization.

388389280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30821 (or 30813 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 388389280 is about 19707.5944752271. The cubic root of 388389280 is about 729.6071445963.

The spelling of 388389280 in words is "three hundred eighty-eight million, three hundred eighty-nine thousand, two hundred eighty".