72337520 has 20 divisors (see below), whose sum is σ = 168184920. Its totient is φ = 28934976.

The previous prime is 72337469. The next prime is 72337537. The reversal of 72337520 is 2573327.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452030 + ... + 452189.

It is an arithmetic number, because the mean of its divisors is an integer number (8409246).

Almost surely, 2^72337520 is an apocalyptic number.

It is an amenable number.

72337520 is an abundant number, since it is smaller than the sum of its proper divisors (95847400).

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

72337520 is a wasteful number, since it uses less digits than its factorization.

72337520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904232 (or 904226 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 29.

The square root of 72337520 is about 8505.1466771597. The cubic root of 72337520 is about 416.6658161760.

The spelling of 72337520 in words is "seventy-two million, three hundred thirty-seven thousand, five hundred twenty".