388900004 has 12 divisors (see below), whose sum is σ = 680970444. Its totient is φ = 194337024.

The previous prime is 388899997. The next prime is 388900019. The reversal of 388900004 is 400009883.

It can be written as a sum of positive squares in 2 ways, for example, as 163840000 + 225060004 = 12800^2 + 15002^2 .

It is a super-2 number, since 2×388900004² = 302486426222400032, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20249 + ... + 34464.

It is an arithmetic number, because the mean of its divisors is an integer number (56747537).

Almost surely, 2^388900004 is an apocalyptic number.

It is an amenable number.

388900004 is a deficient number, since it is larger than the sum of its proper divisors (292070440).

388900004 is a wasteful number, since it uses less digits than its factorization.

388900004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56494 (or 56492 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 388900004 is about 19720.5477611551. The cubic root of 388900004 is about 729.9268107020.

Adding to 388900004 its reverse (400009883), we get a palindrome (788909887).

The spelling of 388900004 in words is "three hundred eighty-eight million, nine hundred thousand, four".