388998236 has 12 divisors (see below), whose sum is σ = 742633080. Its totient is φ = 176817360.

The previous prime is 388998223. The next prime is 388998293. The reversal of 388998236 is 632899883.

It is a super-2 number, since 2×388998236² = 302639255222223392, which contains 22 as substring.

It is a congruent number.

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, 4420391 + ... + 4420478.

It is an arithmetic number, because the mean of its divisors is an integer number (61886090).

Almost surely, 2^388998236 is an apocalyptic number.

It is an amenable number.

388998236 is a deficient number, since it is larger than the sum of its proper divisors (353634844).

388998236 is a wasteful number, since it uses less digits than its factorization.

388998236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8840884 (or 8840882 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 56.

The square root of 388998236 is about 19723.0382040902. The cubic root of 388998236 is about 729.9882627749.

The spelling of 388998236 in words is "three hundred eighty-eight million, nine hundred ninety-eight thousand, two hundred thirty-six".