1387936772 has 24 divisors (see below), whose sum is σ = 2451649536. Its totient is φ = 687482208.

The previous prime is 1387936769. The next prime is 1387936799. The reversal of 1387936772 is 2776397831.

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 7 ways as a sum of consecutive naturals, for example, 431723 + ... + 434925.

It is an arithmetic number, because the mean of its divisors is an integer number (102152064).

Almost surely, 2^1387936772 is an apocalyptic number.

It is an amenable number.

1387936772 is a deficient number, since it is larger than the sum of its proper divisors (1063712764).

1387936772 is a wasteful number, since it uses less digits than its factorization.

1387936772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187 (or 4185 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 53.

The square root of 1387936772 is about 37255.0234465099. The cubic root of 1387936772 is about 1115.4665738225.

The spelling of 1387936772 in words is "one billion, three hundred eighty-seven million, nine hundred thirty-six thousand, seven hundred seventy-two".