388722828 has 24 divisors (see below), whose sum is σ = 976791088. Its totient is φ = 119606976.

The previous prime is 388722827. The next prime is 388722899. The reversal of 388722828 is 828227883.

It is a happy number.

It is a super-2 number, since 2×388722828² = 302210874016635168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388722821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245751 + ... + 1246062.

Almost surely, 2^388722828 is an apocalyptic number.

It is an amenable number.

388722828 is an abundant number, since it is smaller than the sum of its proper divisors (588068260).

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

388722828 is a wasteful number, since it uses less digits than its factorization.

388722828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491833 (or 2491831 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The square root of 388722828 is about 19716.0550820898. The cubic root of 388722828 is about 729.8159465932.

The spelling of 388722828 in words is "three hundred eighty-eight million, seven hundred twenty-two thousand, eight hundred twenty-eight".