72797980 has 24 divisors (see below), whose sum is σ = 153101088. Its totient is φ = 29076288.

The previous prime is 72797969. The next prime is 72797999. The reversal of 72797980 is 8979727.

It is a congruent number.

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, 13657 + ... + 18223.

It is an arithmetic number, because the mean of its divisors is an integer number (6379212).

Almost surely, 2^72797980 is an apocalyptic number.

It is an amenable number.

72797980 is an abundant number, since it is smaller than the sum of its proper divisors (80303108).

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

72797980 is a wasteful number, since it uses less digits than its factorization.

72797980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373 (or 5371 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 72797980 is about 8532.1732284337. The cubic root of 72797980 is about 417.5480337243.

The spelling of 72797980 in words is "seventy-two million, seven hundred ninety-seven thousand, nine hundred eighty".