32561920 has 36 divisors (see below), whose sum is σ = 77999040. Its totient is φ = 13024256.

The previous prime is 32561909. The next prime is 32561927. The reversal of 32561920 is 2916523.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32561927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11440 + ... + 13999.

It is an arithmetic number, because the mean of its divisors is an integer number (2166640).

Almost surely, 2^32561920 is an apocalyptic number.

It is an amenable number.

32561920 is an abundant number, since it is smaller than the sum of its proper divisors (45437120).

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

32561920 is an equidigital number, since it uses as much as digits as its factorization.

32561920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25460 (or 25446 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 32561920 is about 5706.3052845077. The cubic root of 32561920 is about 319.3277554282.

The spelling of 32561920 in words is "thirty-two million, five hundred sixty-one thousand, nine hundred twenty".