72601520 has 40 divisors (see below), whose sum is σ = 171993456. Its totient is φ = 28491008.

The previous prime is 72601481. The next prime is 72601523. The reversal of 72601520 is 2510627.

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 (72601523) 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, 4322 + ... + 12801.

Almost surely, 2^72601520 is an apocalyptic number.

It is an amenable number.

72601520 is an abundant number, since it is smaller than the sum of its proper divisors (99391936).

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

72601520 is a wasteful number, since it uses less digits than its factorization.

72601520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17189 (or 17183 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 72601520 is about 8520.6525571696. The cubic root of 72601520 is about 417.1720828606.

The spelling of 72601520 in words is "seventy-two million, six hundred one thousand, five hundred twenty".