72523272 has 32 divisors (see below), whose sum is σ = 184384800. Its totient is φ = 23764224.

The previous prime is 72523267. The next prime is 72523289. The reversal of 72523272 is 27232527.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24193 + ... + 27024.

It is an arithmetic number, because the mean of its divisors is an integer number (5762025).

Almost surely, 2^72523272 is an apocalyptic number.

It is an amenable number.

72523272 is an abundant number, since it is smaller than the sum of its proper divisors (111861528).

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

72523272 is a wasteful number, since it uses less digits than its factorization.

72523272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51285 (or 51281 counting only the distinct ones).

The product of its digits is 11760, while the sum is 30.

The square root of 72523272 is about 8516.0596522101. The cubic root of 72523272 is about 417.0221566360.

Adding to 72523272 its reverse (27232527), we get a palindrome (99755799).

The spelling of 72523272 in words is "seventy-two million, five hundred twenty-three thousand, two hundred seventy-two".