72799578 has 12 divisors (see below), whose sum is σ = 157732458. Its totient is φ = 24266520.

The previous prime is 72799553. The next prime is 72799589. The reversal of 72799578 is 87599727.

It can be written as a sum of positive squares in only one way, i.e., 59861169 + 12938409 = 7737^2 + 3597^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2022193 + ... + 2022228.

Almost surely, 2^72799578 is an apocalyptic number.

72799578 is an abundant number, since it is smaller than the sum of its proper divisors (84932880).

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

72799578 is a wasteful number, since it uses less digits than its factorization.

72799578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044429 (or 4044426 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 72799578 is about 8532.2668734633. The cubic root of 72799578 is about 417.5510889230.

The spelling of 72799578 in words is "seventy-two million, seven hundred ninety-nine thousand, five hundred seventy-eight".