72706180 has 24 divisors (see below), whose sum is σ = 155933568. Its totient is φ = 28463328.

The previous prime is 72706177. The next prime is 72706181. The reversal of 72706180 is 8160727.

It is a happy number.

It is a super-2 number, since 2×72706180² = 10572377220384800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72706181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37734 + ... + 39613.

It is an arithmetic number, because the mean of its divisors is an integer number (6497232).

Almost surely, 2^72706180 is an apocalyptic number.

It is an amenable number.

72706180 is an abundant number, since it is smaller than the sum of its proper divisors (83227388).

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

72706180 is a wasteful number, since it uses less digits than its factorization.

72706180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77403 (or 77401 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 72706180 is about 8526.7918937898. The cubic root of 72706180 is about 417.3724472000.

The spelling of 72706180 in words is "seventy-two million, seven hundred six thousand, one hundred eighty".