721986496 has 112 divisors (see below), whose sum is σ = 1796613120. Its totient is φ = 279659520.

The previous prime is 721986449. The next prime is 721986509. The reversal of 721986496 is 694689127.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177486 + ... + 1178098.

Almost surely, 2^721986496 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 721986496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898306560).

721986496 is an abundant number, since it is smaller than the sum of its proper divisors (1074626624).

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

721986496 is a wasteful number, since it uses less digits than its factorization.

721986496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882 (or 872 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 721986496 is about 26869.8064004935. The cubic root of 721986496 is about 897.1044787487.

The spelling of 721986496 in words is "seven hundred twenty-one million, nine hundred eighty-six thousand, four hundred ninety-six".