72320532 has 12 divisors (see below), whose sum is σ = 168747936. Its totient is φ = 24106840.

The previous prime is 72320527. The next prime is 72320543. The reversal of 72320532 is 23502327.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 3013344 + ... + 3013367.

It is an arithmetic number, because the mean of its divisors is an integer number (14062328).

Almost surely, 2^72320532 is an apocalyptic number.

It is an amenable number.

72320532 is an abundant number, since it is smaller than the sum of its proper divisors (96427404).

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

72320532 is a wasteful number, since it uses less digits than its factorization.

72320532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026718 (or 6026716 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 72320532 is about 8504.1479290991. The cubic root of 72320532 is about 416.6331965292.

Adding to 72320532 its reverse (23502327), we get a palindrome (95822859).

The spelling of 72320532 in words is "seventy-two million, three hundred twenty thousand, five hundred thirty-two".