72274560 has 64 divisors (see below), whose sum is σ = 230381280. Its totient is φ = 19272704.

The previous prime is 72274519. The next prime is 72274577. The reversal of 72274560 is 6547227.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×72274560² = 10447224046387200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 16902 + ... + 20741.

Almost surely, 2^72274560 is an apocalyptic number.

It is an amenable number.

72274560 is an abundant number, since it is smaller than the sum of its proper divisors (158106720).

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

72274560 is a wasteful number, since it uses less digits than its factorization.

72274560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37665 (or 37653 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 72274560 is about 8501.4445831282. Note that the first 3 decimals coincide. The cubic root of 72274560 is about 416.5448973946.

The spelling of 72274560 in words is "seventy-two million, two hundred seventy-four thousand, five hundred sixty".