721856096 has 48 divisors (see below), whose sum is σ = 1534320144. Its totient is φ = 332327424.

The previous prime is 721856071. The next prime is 721856099. The reversal of 721856096 is 690658127.

It is a super-2 number, since 2×721856096² = 1042152446664722432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721856099) 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, 182330 + ... + 186246.

It is an arithmetic number, because the mean of its divisors is an integer number (31965003).

Almost surely, 2^721856096 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 721856096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (767160072).

721856096 is an abundant number, since it is smaller than the sum of its proper divisors (812464048).

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

721856096 is a wasteful number, since it uses less digits than its factorization.

721856096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4383 (or 4375 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 721856096 is about 26867.3797754824. The cubic root of 721856096 is about 897.0504659805.

The spelling of 721856096 in words is "seven hundred twenty-one million, eight hundred fifty-six thousand, ninety-six".