72491284 has 12 divisors (see below), whose sum is σ = 128647008. Its totient is φ = 35735000.

The previous prime is 72491273. The next prime is 72491311. The reversal of 72491284 is 48219427.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127342 + ... + 127909.

It is an arithmetic number, because the mean of its divisors is an integer number (10720584).

Almost surely, 2^72491284 is an apocalyptic number.

It is an amenable number.

72491284 is a deficient number, since it is larger than the sum of its proper divisors (56155724).

72491284 is a wasteful number, since it uses less digits than its factorization.

72491284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255326 (or 255324 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 72491284 is about 8514.1813464361. The cubic root of 72491284 is about 416.9608353244.

The spelling of 72491284 in words is "seventy-two million, four hundred ninety-one thousand, two hundred eighty-four".