72512722 has 8 divisors (see below), whose sum is σ = 108846972. Its totient is φ = 36230400.

The previous prime is 72512707. The next prime is 72512743. The reversal of 72512722 is 22721527.

It can be written as a sum of positive squares in 2 ways, for example, as 62583921 + 9928801 = 7911^2 + 3151^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9279 + ... + 15202.

Almost surely, 2^72512722 is an apocalyptic number.

72512722 is a deficient number, since it is larger than the sum of its proper divisors (36334250).

72512722 is a wasteful number, since it uses less digits than its factorization.

72512722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25964.

The product of its digits is 3920, while the sum is 28.

The square root of 72512722 is about 8515.4402117565. The cubic root of 72512722 is about 417.0019341751.

The spelling of 72512722 in words is "seventy-two million, five hundred twelve thousand, seven hundred twenty-two".