1392138688 has 28 divisors (see below), whose sum is σ = 2763709992. Its totient is φ = 695770880.

The previous prime is 1392138679. The next prime is 1392138697. The reversal of 1392138688 is 8868312931.

It is an interprime number because it is at equal distance from previous prime (1392138679) and next prime (1392138697).

It is a super-2 number, since 2×1392138688² = 3876100253252722688, 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, 294423 + ... + 299113.

Almost surely, 2^1392138688 is an apocalyptic number.

It is an amenable number.

1392138688 is a deficient number, since it is larger than the sum of its proper divisors (1371571304).

1392138688 is an equidigital number, since it uses as much as digits as its factorization.

1392138688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9340 (or 9330 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 1392138688 is about 37311.3747803535. The cubic root of 1392138688 is about 1116.5911146725.

The spelling of 1392138688 in words is "one billion, three hundred ninety-two million, one hundred thirty-eight thousand, six hundred eighty-eight".