72331758 has 64 divisors (see below), whose sum is σ = 166233600. Its totient is φ = 23302080.

The previous prime is 72331723. The next prime is 72331769. The reversal of 72331758 is 85713327.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232423 + ... + 232733.

It is an arithmetic number, because the mean of its divisors is an integer number (2597400).

Almost surely, 2^72331758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72331758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83116800).

72331758 is an abundant number, since it is smaller than the sum of its proper divisors (93901842).

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

72331758 is a wasteful number, since it uses less digits than its factorization.

72331758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 448 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 72331758 is about 8504.8079343393. The cubic root of 72331758 is about 416.6547527971.

The spelling of 72331758 in words is "seventy-two million, three hundred thirty-one thousand, seven hundred fifty-eight".