1389975732 has 36 divisors (see below), whose sum is σ = 3516676800. Its totient is φ = 462912912.

The previous prime is 1389975703. The next prime is 1389975779. The reversal of 1389975732 is 2375799831.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25269 + ... + 58467.

Almost surely, 2^1389975732 is an apocalyptic number.

1389975732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1389975732 is an abundant number, since it is smaller than the sum of its proper divisors (2126701068).

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

1389975732 is a wasteful number, since it uses less digits than its factorization.

1389975732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34372 (or 34367 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 1389975732 is about 37282.3783039655. The cubic root of 1389975732 is about 1116.0125350270.

The spelling of 1389975732 in words is "one billion, three hundred eighty-nine million, nine hundred seventy-five thousand, seven hundred thirty-two".