1387724974 has 16 divisors (see below), whose sum is σ = 2127146112. Its totient is φ = 678838968.

The previous prime is 1387724927. The next prime is 1387724993. The reversal of 1387724974 is 4794277831.

It is a happy number.

It is a congruent number.

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, 23484 + ... + 57679.

It is an arithmetic number, because the mean of its divisors is an integer number (132946632).

Almost surely, 2^1387724974 is an apocalyptic number.

1387724974 is a deficient number, since it is larger than the sum of its proper divisors (739421138).

1387724974 is a wasteful number, since it uses less digits than its factorization.

1387724974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81351.

The product of its digits is 2370816, while the sum is 52.

The square root of 1387724974 is about 37252.1807952233. The cubic root of 1387724974 is about 1115.4098311782.

The spelling of 1387724974 in words is "one billion, three hundred eighty-seven million, seven hundred twenty-four thousand, nine hundred seventy-four".