72820224 has 60 divisors (see below), whose sum is σ = 210177396. Its totient is φ = 24271872.

The previous prime is 72820213. The next prime is 72820259. The reversal of 72820224 is 42202827.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3294 + ... + 12509.

Almost surely, 2^72820224 is an apocalyptic number.

It is an amenable number.

72820224 is an abundant number, since it is smaller than the sum of its proper divisors (137357172).

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

72820224 is a wasteful number, since it uses less digits than its factorization.

72820224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15827 (or 15808 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 72820224 is about 8533.4766654629. The cubic root of 72820224 is about 417.5905577642.

The spelling of 72820224 in words is "seventy-two million, eight hundred twenty thousand, two hundred twenty-four".