388280328 has 16 divisors (see below), whose sum is σ = 970700880. Its totient is φ = 129426768.

The previous prime is 388280309. The next prime is 388280369. The reversal of 388280328 is 823082883.

It is a super-2 number, since 2×388280328² = 301523226223575168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 388280328.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8089150 + ... + 8089197.

It is an arithmetic number, because the mean of its divisors is an integer number (60668805).

Almost surely, 2^388280328 is an apocalyptic number.

It is an amenable number.

388280328 is an abundant number, since it is smaller than the sum of its proper divisors (582420552).

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

388280328 is a wasteful number, since it uses less digits than its factorization.

388280328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16178356 (or 16178352 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 388280328 is about 19704.8300677778. The cubic root of 388280328 is about 729.5389144331.

The spelling of 388280328 in words is "three hundred eighty-eight million, two hundred eighty thousand, three hundred twenty-eight".