72230756 has 48 divisors (see below), whose sum is σ = 145741680. Its totient is φ = 31027200.

The previous prime is 72230747. The next prime is 72230779. The reversal of 72230756 is 65703227.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 14318656 + 57912100 = 3784^2 + 7610^2 .

It is a super-2 number, since 2×72230756² = 10434564224663072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88880 + ... + 89688.

It is an arithmetic number, because the mean of its divisors is an integer number (3036285).

Almost surely, 2^72230756 is an apocalyptic number.

It is an amenable number.

72230756 is an abundant number, since it is smaller than the sum of its proper divisors (73510924).

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

72230756 is a wasteful number, since it uses less digits than its factorization.

72230756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 72230756 is about 8498.8679246121. The cubic root of 72230756 is about 416.4607275283.

The spelling of 72230756 in words is "seventy-two million, two hundred thirty thousand, seven hundred fifty-six".