72472730 has 64 divisors (see below), whose sum is σ = 150045696. Its totient is φ = 24960000.

The previous prime is 72472703. The next prime is 72472733. The reversal of 72472730 is 3727427.

It is not an unprimeable number, because it can be changed into a prime (72472733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180530 + ... + 180930.

It is an arithmetic number, because the mean of its divisors is an integer number (2344464).

Almost surely, 2^72472730 is an apocalyptic number.

72472730 is an abundant number, since it is smaller than the sum of its proper divisors (77572966).

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

72472730 is a wasteful number, since it uses less digits than its factorization.

72472730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 72472730 is about 8513.0916828142. The cubic root of 72472730 is about 416.9252588568.

The spelling of 72472730 in words is "seventy-two million, four hundred seventy-two thousand, seven hundred thirty".