32139920 has 40 divisors (see below), whose sum is σ = 76471296. Its totient is φ = 12555648.

The previous prime is 32139907. The next prime is 32139923. The reversal of 32139920 is 2993123.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (32139923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1232 + ... + 8111.

Almost surely, 2^32139920 is an apocalyptic number.

It is an amenable number.

32139920 is an abundant number, since it is smaller than the sum of its proper divisors (44331376).

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

32139920 is a wasteful number, since it uses less digits than its factorization.

32139920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9399 (or 9393 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 32139920 is about 5669.2080575685. The cubic root of 32139920 is about 317.9422650086.

The spelling of 32139920 in words is "thirty-two million, one hundred thirty-nine thousand, nine hundred twenty".