744724321 has 32 divisors (see below), whose sum is σ = 900460800. Its totient is φ = 607918080.

The previous prime is 744724307. The next prime is 744724327. The reversal of 744724321 is 123427447.

744724321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 744724321 - 2²⁹ = 207853409 is a prime.

It is a super-2 number, since 2×744724321² = 1109228628577822082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744724327) 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, 481876 + ... + 483418.

It is an arithmetic number, because the mean of its divisors is an integer number (28139400).

Almost surely, 2^744724321 is an apocalyptic number.

It is an amenable number.

744724321 is a deficient number, since it is larger than the sum of its proper divisors (155736479).

744724321 is a wasteful number, since it uses less digits than its factorization.

744724321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689.

The product of its digits is 37632, while the sum is 34.

The square root of 744724321 is about 27289.6376121047. The cubic root of 744724321 is about 906.4249383665.

The spelling of 744724321 in words is "seven hundred forty-four million, seven hundred twenty-four thousand, three hundred twenty-one".