72725320 has 32 divisors (see below), whose sum is σ = 173259000. Its totient is φ = 27378688.

The previous prime is 72725311. The next prime is 72725321. The reversal of 72725320 is 2352727.

It can be written as a sum of positive squares in 4 ways, for example, as 66683556 + 6041764 = 8166^2 + 2458^2 .

It is not an unprimeable number, because it can be changed into a prime (72725321) 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, 52795 + ... + 54154.

Almost surely, 2^72725320 is an apocalyptic number.

It is an amenable number.

72725320 is an abundant number, since it is smaller than the sum of its proper divisors (100533680).

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

72725320 is a wasteful number, since it uses less digits than its factorization.

72725320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106977 (or 106973 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 72725320 is about 8527.9141646712. The cubic root of 72725320 is about 417.4090686066.

The spelling of 72725320 in words is "seventy-two million, seven hundred twenty-five thousand, three hundred twenty".