72500090 has 16 divisors (see below), whose sum is σ = 140538888. Its totient is φ = 26769216.

The previous prime is 72500081. The next prime is 72500101. The reversal of 72500090 is 9000527.

It can be written as a sum of positive squares in 4 ways, for example, as 43652449 + 28847641 = 6607^2 + 5371^2 .

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, 278717 + ... + 278976.

Almost surely, 2^72500090 is an apocalyptic number.

72500090 is a deficient number, since it is larger than the sum of its proper divisors (68038798).

72500090 is a wasteful number, since it uses less digits than its factorization.

72500090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557713.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 72500090 is about 8514.6984679435. The cubic root of 72500090 is about 416.9777183125.

The spelling of 72500090 in words is "seventy-two million, five hundred thousand, ninety".