726724387 has 16 divisors (see below), whose sum is σ = 753016320. Its totient is φ = 700971552.

The previous prime is 726724379. The next prime is 726724403. The reversal of 726724387 is 783427627.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 726724387 - 2³ = 726724379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726724087) 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, 1129888 + ... + 1130530.

It is an arithmetic number, because the mean of its divisors is an integer number (47063520).

Almost surely, 2^726724387 is an apocalyptic number.

726724387 is a deficient number, since it is larger than the sum of its proper divisors (26291933).

726724387 is a wasteful number, since it uses less digits than its factorization.

726724387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002.

The product of its digits is 790272, while the sum is 46.

The square root of 726724387 is about 26957.8260807507. The cubic root of 726724387 is about 899.0625576415.

The spelling of 726724387 in words is "seven hundred twenty-six million, seven hundred twenty-four thousand, three hundred eighty-seven".