72077992 has 32 divisors (see below), whose sum is σ = 159782400. Its totient is φ = 29824704.

The previous prime is 72077987. The next prime is 72078031. The reversal of 72077992 is 29977027.

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, 20568 + ... + 23815.

It is an arithmetic number, because the mean of its divisors is an integer number (4993200).

Almost surely, 2^72077992 is an apocalyptic number.

It is an amenable number.

72077992 is an abundant number, since it is smaller than the sum of its proper divisors (87704408).

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

72077992 is a wasteful number, since it uses less digits than its factorization.

72077992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44425 (or 44421 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 72077992 is about 8489.8758530381. The cubic root of 72077992 is about 416.1669232731.

The spelling of 72077992 in words is "seventy-two million, seventy-seven thousand, nine hundred ninety-two".