724572730 has 32 divisors (see below), whose sum is σ = 1492275456. Its totient is φ = 248137344.

The previous prime is 724572721. The next prime is 724572757. The reversal of 724572730 is 37275427.

It is a self number, because there is not a number n which added to its sum of digits gives 724572730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60067 + ... + 71113.

It is an arithmetic number, because the mean of its divisors is an integer number (46633608).

Almost surely, 2^724572730 is an apocalyptic number.

724572730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

724572730 is an abundant number, since it is smaller than the sum of its proper divisors (767702726).

724572730 is a wasteful number, since it uses less digits than its factorization.

724572730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11998.

The product of its (nonzero) digits is 82320, while the sum is 37.

The square root of 724572730 is about 26917.8886616317. Note that the first 3 decimals coincide. The cubic root of 724572730 is about 898.1743774737.

The spelling of 724572730 in words is "seven hundred twenty-four million, five hundred seventy-two thousand, seven hundred thirty".