72672220 has 48 divisors (see below), whose sum is σ = 156246048. Its totient is φ = 28385280.

The previous prime is 72672209. The next prime is 72672241. The reversal of 72672220 is 2227627.

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, 258480 + ... + 258760.

It is an arithmetic number, because the mean of its divisors is an integer number (3255126).

Almost surely, 2^72672220 is an apocalyptic number.

It is an amenable number.

72672220 is an abundant number, since it is smaller than the sum of its proper divisors (83573828).

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

72672220 is a wasteful number, since it uses less digits than its factorization.

72672220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 72672220 is about 8524.8002909159. The cubic root of 72672220 is about 417.3074542118.

Adding to 72672220 its reverse (2227627), we get a palindrome (74899847).

The spelling of 72672220 in words is "seventy-two million, six hundred seventy-two thousand, two hundred twenty".