72220620 has 48 divisors (see below), whose sum is σ = 202674528. Its totient is φ = 19215360.

The previous prime is 72220619. The next prime is 72220627. The reversal of 72220620 is 2602227.

It is not an unprimeable number, because it can be changed into a prime (72220627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32340 + ... + 34500.

It is an arithmetic number, because the mean of its divisors is an integer number (4222386).

Almost surely, 2^72220620 is an apocalyptic number.

It is an amenable number.

72220620 is an abundant number, since it is smaller than the sum of its proper divisors (130453908).

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

72220620 is a wasteful number, since it uses less digits than its factorization.

72220620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 2728 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 72220620 is about 8498.2715889762. The cubic root of 72220620 is about 416.4412462453.

Adding to 72220620 its reverse (2602227), we get a palindrome (74822847).

The spelling of 72220620 in words is "seventy-two million, two hundred twenty thousand, six hundred twenty".