721174896 has 120 divisors (see below), whose sum is σ = 2183454000. Its totient is φ = 220889088.

The previous prime is 721174891. The next prime is 721174931. The reversal of 721174896 is 698471127.

It is a happy number.

It is a super-2 number, since 2×721174896² = 1040186461241221632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721174891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 480355 + ... + 481853.

It is an arithmetic number, because the mean of its divisors is an integer number (18195450).

Almost surely, 2^721174896 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 721174896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1091727000).

721174896 is an abundant number, since it is smaller than the sum of its proper divisors (1462279104).

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

721174896 is a wasteful number, since it uses less digits than its factorization.

721174896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783 (or 1774 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 721174896 is about 26854.6997004249. The cubic root of 721174896 is about 896.7682014591.

The spelling of 721174896 in words is "seven hundred twenty-one million, one hundred seventy-four thousand, eight hundred ninety-six".