72525278 has 16 divisors (see below), whose sum is σ = 126437760. Its totient is φ = 30555096.

The previous prime is 72525241. The next prime is 72525283. The reversal of 72525278 is 87252527.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43076 + ... + 44727.

It is an arithmetic number, because the mean of its divisors is an integer number (7902360).

Almost surely, 2^72525278 is an apocalyptic number.

72525278 is a deficient number, since it is larger than the sum of its proper divisors (53912482).

72525278 is a wasteful number, since it uses less digits than its factorization.

72525278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87871.

The product of its digits is 78400, while the sum is 38.

The square root of 72525278 is about 8516.1774288703. The cubic root of 72525278 is about 417.0260015569.

The spelling of 72525278 in words is "seventy-two million, five hundred twenty-five thousand, two hundred seventy-eight".