1388956556 has 24 divisors (see below), whose sum is σ = 2618916720. Its totient is φ = 640746432.

The previous prime is 1388956511. The next prime is 1388956573. The reversal of 1388956556 is 6556598831.

It is a super-2 number, since 2×1388956556² = 3858400628910762272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128930 + ... + 139286.

It is an arithmetic number, because the mean of its divisors is an integer number (109121530).

Almost surely, 2^1388956556 is an apocalyptic number.

It is an amenable number.

1388956556 is a deficient number, since it is larger than the sum of its proper divisors (1229960164).

1388956556 is a wasteful number, since it uses less digits than its factorization.

1388956556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12953 (or 12951 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 56.

The square root of 1388956556 is about 37268.7074635008. The cubic root of 1388956556 is about 1115.7397026136.

The spelling of 1388956556 in words is "one billion, three hundred eighty-eight million, nine hundred fifty-six thousand, five hundred fifty-six".