72326560 has 24 divisors (see below), whose sum is σ = 170871876. Its totient is φ = 28930560.

The previous prime is 72326539. The next prime is 72326563. The reversal of 72326560 is 6562327.

It can be written as a sum of positive squares in 2 ways, for example, as 61277584 + 11048976 = 7828^2 + 3324^2 .

It is a super-2 number, since 2×72326560² = 10462262562867200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (72326563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225861 + ... + 226180.

Almost surely, 2^72326560 is an apocalyptic number.

It is an amenable number.

72326560 is an abundant number, since it is smaller than the sum of its proper divisors (98545316).

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

72326560 is a wasteful number, since it uses less digits than its factorization.

72326560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452056 (or 452048 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 72326560 is about 8504.5023369977. The cubic root of 72326560 is about 416.6447718273.

Adding to 72326560 its reverse (6562327), we get a palindrome (78888887).

The spelling of 72326560 in words is "seventy-two million, three hundred twenty-six thousand, five hundred sixty".