388630816 has 96 divisors (see below), whose sum is σ = 919150848. Its totient is φ = 158146560.

The previous prime is 388630813. The next prime is 388630859. The reversal of 388630816 is 618036883.

It is a super-2 number, since 2×388630816² = 302067822289651712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388630813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241476 + ... + 1241788.

It is an arithmetic number, because the mean of its divisors is an integer number (9574488).

Almost surely, 2^388630816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388630816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459575424).

388630816 is an abundant number, since it is smaller than the sum of its proper divisors (530520032).

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

388630816 is a wasteful number, since it uses less digits than its factorization.

388630816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 388630816 is about 19713.7215157362. The cubic root of 388630816 is about 729.7583587533.

The spelling of 388630816 in words is "three hundred eighty-eight million, six hundred thirty thousand, eight hundred sixteen".