72738390 has 16 divisors (see below), whose sum is σ = 174572208. Its totient is φ = 19396896.

The previous prime is 72738389. The next prime is 72738433. The reversal of 72738390 is 9383727.

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, 1212277 + ... + 1212336.

It is an arithmetic number, because the mean of its divisors is an integer number (10910763).

Almost surely, 2^72738390 is an apocalyptic number.

72738390 is an abundant number, since it is smaller than the sum of its proper divisors (101833818).

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

72738390 is a wasteful number, since it uses less digits than its factorization.

72738390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424623.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 72738390 is about 8528.6804372072. The cubic root of 72738390 is about 417.4340723226.

The spelling of 72738390 in words is "seventy-two million, seven hundred thirty-eight thousand, three hundred ninety".