72706312 has 64 divisors (see below), whose sum is σ = 171187200. Its totient is φ = 28226880.

The previous prime is 72706303. The next prime is 72706339. The reversal of 72706312 is 21360727.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22987 + ... + 25957.

It is an arithmetic number, because the mean of its divisors is an integer number (2674800).

Almost surely, 2^72706312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72706312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85593600).

72706312 is an abundant number, since it is smaller than the sum of its proper divisors (98480888).

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

72706312 is a wasteful number, since it uses less digits than its factorization.

72706312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026 (or 3022 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 72706312 is about 8526.7996340948. The cubic root of 72706312 is about 417.3726997834.

The spelling of 72706312 in words is "seventy-two million, seven hundred six thousand, three hundred twelve".