724400243 has 16 divisors (see below), whose sum is σ = 888603840. Its totient is φ = 576377856.

The previous prime is 724400239. The next prime is 724400267. The reversal of 724400243 is 342004427.

It is a cyclic number.

It is not a de Polignac number, because 724400243 - 2² = 724400239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724405243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33008 + ... + 50381.

It is an arithmetic number, because the mean of its divisors is an integer number (55537740).

Almost surely, 2^724400243 is an apocalyptic number.

724400243 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

724400243 is a deficient number, since it is larger than the sum of its proper divisors (164203597).

724400243 is a wasteful number, since it uses less digits than its factorization.

724400243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83486.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 724400243 is about 26914.6845235087. The cubic root of 724400243 is about 898.1031006635.

The spelling of 724400243 in words is "seven hundred twenty-four million, four hundred thousand, two hundred forty-three".