726896640 has 104 divisors (see below), whose sum is σ = 2325981888. Its totient is φ = 193822720.

The previous prime is 726896627. The next prime is 726896657. The reversal of 726896640 is 46698627.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 726896640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55525 + ... + 67355.

Almost surely, 2^726896640 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 726896640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162990944).

726896640 is an abundant number, since it is smaller than the sum of its proper divisors (1599085248).

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

726896640 is a wasteful number, since it uses less digits than its factorization.

726896640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11863 (or 11841 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 726896640 is about 26961.0207521896. The cubic root of 726896640 is about 899.1335859393.

The spelling of 726896640 in words is "seven hundred twenty-six million, eight hundred ninety-six thousand, six hundred forty".