724991172 has 48 divisors (see below), whose sum is σ = 1793444352. Its totient is φ = 227543040.

The previous prime is 724991171. The next prime is 724991221. The reversal of 724991172 is 271199427.

It is a super-2 number, since 2×724991172² = 1051224398955867168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (724991171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12573 + ... + 40100.

It is an arithmetic number, because the mean of its divisors is an integer number (37363424).

Almost surely, 2^724991172 is an apocalyptic number.

It is an amenable number.

724991172 is an abundant number, since it is smaller than the sum of its proper divisors (1068453180).

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

724991172 is a wasteful number, since it uses less digits than its factorization.

724991172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52748 (or 52746 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 724991172 is about 26925.6601033289. The cubic root of 724991172 is about 898.3472432847.

The spelling of 724991172 in words is "seven hundred twenty-four million, nine hundred ninety-one thousand, one hundred seventy-two".