72501028 has 12 divisors (see below), whose sum is σ = 126937692. Its totient is φ = 36233120.

The previous prime is 72500983. The next prime is 72501041. The reversal of 72501028 is 82010527.

It can be written as a sum of positive squares in 2 ways, for example, as 38837824 + 33663204 = 6232^2 + 5802^2 .

It is a super-2 number, since 2×72501028² = 10512798122113568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72500993 and 72501011.

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, 11226 + ... + 16462.

It is an arithmetic number, because the mean of its divisors is an integer number (10578141).

Almost surely, 2^72501028 is an apocalyptic number.

It is an amenable number.

72501028 is a deficient number, since it is larger than the sum of its proper divisors (54436664).

72501028 is a wasteful number, since it uses less digits than its factorization.

72501028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8702 (or 8700 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 72501028 is about 8514.7535489878. The cubic root of 72501028 is about 416.9795165788.

The spelling of 72501028 in words is "seventy-two million, five hundred one thousand, twenty-eight".