726679720 has 64 divisors (see below), whose sum is σ = 1771434000. Its totient is φ = 268280064.

The previous prime is 726679699. The next prime is 726679781. The reversal of 726679720 is 27976627.

It can be written as a sum of positive squares in 8 ways, for example, as 161604 + 726518116 = 402^2 + 26954^2 .

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83746 + ... + 92014.

Almost surely, 2^726679720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 726679720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885717000).

726679720 is an abundant number, since it is smaller than the sum of its proper divisors (1044754280).

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

726679720 is a wasteful number, since it uses less digits than its factorization.

726679720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8319 (or 8289 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 46.

The square root of 726679720 is about 26956.9976073004. The cubic root of 726679720 is about 899.0441374303.

The spelling of 726679720 in words is "seven hundred twenty-six million, six hundred seventy-nine thousand, seven hundred twenty".