72492705 has 32 divisors (see below), whose sum is σ = 131003520. Its totient is φ = 38024640.

The previous prime is 72492701. The next prime is 72492793. The reversal of 72492705 is 50729427.

It is not a de Polignac number, because 72492705 - 2² = 72492701 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72492705.

It is not an unprimeable number, because it can be changed into a prime (72492701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3834 + ... + 12636.

It is an arithmetic number, because the mean of its divisors is an integer number (4093860).

Almost surely, 2^72492705 is an apocalyptic number.

It is an amenable number.

72492705 is a deficient number, since it is larger than the sum of its proper divisors (58510815).

72492705 is a wasteful number, since it uses less digits than its factorization.

72492705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8878 (or 8872 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 72492705 is about 8514.2647950366. The cubic root of 72492705 is about 416.9635597783.

The spelling of 72492705 in words is "seventy-two million, four hundred ninety-two thousand, seven hundred five".