726340880 has 40 divisors (see below), whose sum is σ = 1690652952. Its totient is φ = 290207744.

The previous prime is 726340843. The next prime is 726340889. The reversal of 726340880 is 88043627.

It can be written as a sum of positive squares in 4 ways, for example, as 77721856 + 648619024 = 8816^2 + 25468^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (726340889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73514 + ... + 82806.

Almost surely, 2^726340880 is an apocalyptic number.

It is an amenable number.

726340880 is an abundant number, since it is smaller than the sum of its proper divisors (964312072).

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

726340880 is a wasteful number, since it uses less digits than its factorization.

726340880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10283 (or 10277 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 726340880 is about 26950.7120499626. The cubic root of 726340880 is about 898.9043787132.

The spelling of 726340880 in words is "seven hundred twenty-six million, three hundred forty thousand, eight hundred eighty".