72755226 has 32 divisors (see below), whose sum is σ = 165443520. Its totient is φ = 23686992.

The previous prime is 72755203. The next prime is 72755251. The reversal of 72755226 is 62255727.

It is a super-2 number, since 2×72755226² = 10586645820622152, 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, 13345 + ... + 17988.

It is an arithmetic number, because the mean of its divisors is an integer number (5170110).

Almost surely, 2^72755226 is an apocalyptic number.

72755226 is an abundant number, since it is smaller than the sum of its proper divisors (92688294).

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

72755226 is a wasteful number, since it uses less digits than its factorization.

72755226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31387 (or 31381 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 72755226 is about 8529.6674026600. The cubic root of 72755226 is about 417.4662762151.

The spelling of 72755226 in words is "seventy-two million, seven hundred fifty-five thousand, two hundred twenty-six".