72232820 has 24 divisors (see below), whose sum is σ = 165479328. Its totient is φ = 26266400.

The previous prime is 72232763. The next prime is 72232829. The reversal of 72232820 is 2823227.

It is a self number, because there is not a number n which added to its sum of digits gives 72232820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72232829) 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, 163946 + ... + 164385.

It is an arithmetic number, because the mean of its divisors is an integer number (6894972).

Almost surely, 2^72232820 is an apocalyptic number.

It is an amenable number.

72232820 is an abundant number, since it is smaller than the sum of its proper divisors (93246508).

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

72232820 is a wasteful number, since it uses less digits than its factorization.

72232820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328351 (or 328349 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 72232820 is about 8498.9893516818. The cubic root of 72232820 is about 416.4646942908.

The spelling of 72232820 in words is "seventy-two million, two hundred thirty-two thousand, eight hundred twenty".