726724889 has 12 divisors (see below), whose sum is σ = 806498160. Its totient is φ = 649427160.

The previous prime is 726724883. The next prime is 726724907. The reversal of 726724889 is 988427627.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-726724889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726724889.

It is not an unprimeable number, because it can be changed into a prime (726724883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28802 + ... + 47780.

It is an arithmetic number, because the mean of its divisors is an integer number (67208180).

Almost surely, 2^726724889 is an apocalyptic number.

It is an amenable number.

726724889 is a deficient number, since it is larger than the sum of its proper divisors (79773271).

726724889 is a wasteful number, since it uses less digits than its factorization.

726724889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19108 (or 19049 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The square root of 726724889 is about 26957.8353915888. The cubic root of 726724889 is about 899.0627646568.

The spelling of 726724889 in words is "seven hundred twenty-six million, seven hundred twenty-four thousand, eight hundred eighty-nine".