72740540 has 24 divisors (see below), whose sum is σ = 153347040. Its totient is φ = 28983488.

The previous prime is 72740533. The next prime is 72740573. The reversal of 72740540 is 4504727.

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, 1655 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (6389460).

Almost surely, 2^72740540 is an apocalyptic number.

It is an amenable number.

72740540 is an abundant number, since it is smaller than the sum of its proper divisors (80606500).

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

72740540 is a wasteful number, since it uses less digits than its factorization.

72740540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14101 (or 14099 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 72740540 is about 8528.8064815659. The cubic root of 72740540 is about 417.4381851183.

The spelling of 72740540 in words is "seventy-two million, seven hundred forty thousand, five hundred forty".