72322926840 has 320 divisors, whose sum is σ = 261845084160. Its totient is φ = 17851933440.

The previous prime is 72322926799. The next prime is 72322926857. The reversal of 72322926840 is 4862922327.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2294467 + ... + 2325773.

It is an arithmetic number, because the mean of its divisors is an integer number (818265888).

Almost surely, 2^72322926840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72322926840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130922542080).

72322926840 is an abundant number, since it is smaller than the sum of its proper divisors (189522157320).

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

72322926840 is a wasteful number, since it uses less digits than its factorization.

72322926840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31384 (or 31371 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 72322926840 in words is "seventy-two billion, three hundred twenty-two million, nine hundred twenty-six thousand, eight hundred forty".