72515794 has 8 divisors (see below), whose sum is σ = 117140940. Its totient is φ = 33468816.

The previous prime is 72515771. The next prime is 72515797. The reversal of 72515794 is 49751527.

It can be written as a sum of positive squares in 2 ways, for example, as 69939769 + 2576025 = 8363^2 + 1605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (72515797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394509 + ... + 1394560.

Almost surely, 2^72515794 is an apocalyptic number.

72515794 is a deficient number, since it is larger than the sum of its proper divisors (44625146).

72515794 is a wasteful number, since it uses less digits than its factorization.

72515794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789084.

The product of its digits is 88200, while the sum is 40.

The square root of 72515794 is about 8515.6205880723. The cubic root of 72515794 is about 417.0078228514.

The spelling of 72515794 in words is "seventy-two million, five hundred fifteen thousand, seven hundred ninety-four".