73265520 has 80 divisors (see below), whose sum is σ = 239091840. Its totient is φ = 18508032.

The previous prime is 73265519. The next prime is 73265531. The reversal of 73265520 is 2556237.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3474 + ... + 12593.

It is an arithmetic number, because the mean of its divisors is an integer number (2988648).

Almost surely, 2^73265520 is an apocalyptic number.

It is an amenable number.

73265520 is an abundant number, since it is smaller than the sum of its proper divisors (165826320).

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

73265520 is a wasteful number, since it uses less digits than its factorization.

73265520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16102 (or 16096 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 73265520 is about 8559.5280243714. The cubic root of 73265520 is about 418.4400180104.

The spelling of 73265520 in words is "seventy-three million, two hundred sixty-five thousand, five hundred twenty".