1388672904 has 32 divisors (see below), whose sum is σ = 3545550720. Its totient is φ = 453041856.

The previous prime is 1388672899. The next prime is 1388672939. The reversal of 1388672904 is 4092768831.

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, 614419 + ... + 616674.

It is an arithmetic number, because the mean of its divisors is an integer number (110798460).

Almost surely, 2^1388672904 is an apocalyptic number.

It is an amenable number.

1388672904 is an abundant number, since it is smaller than the sum of its proper divisors (2156877816).

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

1388672904 is a wasteful number, since it uses less digits than its factorization.

1388672904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231149 (or 1231145 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1388672904 is about 37264.9017709694. The cubic root of 1388672904 is about 1115.6637455115.

The spelling of 1388672904 in words is "one billion, three hundred eighty-eight million, six hundred seventy-two thousand, nine hundred four".