72706072 has 32 divisors (see below), whose sum is σ = 138730320. Its totient is φ = 35717760.

The previous prime is 72706063. The next prime is 72706099. The reversal of 72706072 is 27060727.

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, 134122 + ... + 134662.

Almost surely, 2^72706072 is an apocalyptic number.

It is an amenable number.

72706072 is a deficient number, since it is larger than the sum of its proper divisors (66024248).

72706072 is a wasteful number, since it uses less digits than its factorization.

72706072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 72706072 is about 8526.7855608078. The cubic root of 72706072 is about 417.3722405406.

Adding to 72706072 its reverse (27060727), we get a palindrome (99766799).

The spelling of 72706072 in words is "seventy-two million, seven hundred six thousand, seventy-two".