1389961932 has 24 divisors (see below), whose sum is σ = 3246625536. Its totient is φ = 462837648.

The previous prime is 1389961919. The next prime is 1389961999. The reversal of 1389961932 is 2391699831.

It is a happy 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, 48288 + ... + 71495.

It is an arithmetic number, because the mean of its divisors is an integer number (135276064).

Almost surely, 2^1389961932 is an apocalyptic number.

1389961932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1389961932 is an abundant number, since it is smaller than the sum of its proper divisors (1856663604).

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

1389961932 is a wasteful number, since it uses less digits than its factorization.

1389961932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120757 (or 120755 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 1389961932 is about 37282.1932294762. The cubic root of 1389961932 is about 1116.0088416714.

The spelling of 1389961932 in words is "one billion, three hundred eighty-nine million, nine hundred sixty-one thousand, nine hundred thirty-two".