72988734 has 96 divisors (see below), whose sum is σ = 185582880. Its totient is φ = 19079424.

The previous prime is 72988691. The next prime is 72988763. The reversal of 72988734 is 43788927.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 645862 + ... + 645974.

It is an arithmetic number, because the mean of its divisors is an integer number (1933155).

Almost surely, 2^72988734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72988734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92791440).

72988734 is an abundant number, since it is smaller than the sum of its proper divisors (112594146).

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

72988734 is a wasteful number, since it uses less digits than its factorization.

72988734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 138 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 72988734 is about 8543.3444270965. The cubic root of 72988734 is about 417.9124187898.

The spelling of 72988734 in words is "seventy-two million, nine hundred eighty-eight thousand, seven hundred thirty-four".