72730370 has 16 divisors (see below), whose sum is σ = 136607040. Its totient is φ = 27827184.

The previous prime is 72730331. The next prime is 72730381. The reversal of 72730370 is 7303727.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157880 + ... + 158339.

It is an arithmetic number, because the mean of its divisors is an integer number (8537940).

Almost surely, 2^72730370 is an apocalyptic number.

72730370 is a deficient number, since it is larger than the sum of its proper divisors (63876670).

72730370 is a wasteful number, since it uses less digits than its factorization.

72730370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316249.

The product of its (nonzero) digits is 6174, while the sum is 29.

The square root of 72730370 is about 8528.2102460012. The cubic root of 72730370 is about 417.4187299231.

The spelling of 72730370 in words is "seventy-two million, seven hundred thirty thousand, three hundred seventy".