721970496 has 168 divisors, whose sum is σ = 2311769824. Its totient is φ = 222082560.

The previous prime is 721970449. The next prime is 721970497. The reversal of 721970496 is 694079127.

721970496 is a `hidden beast` number, since 72 + 1 + 97 + 0 + 496 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721970497) 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, 200391 + ... + 203961.

Almost surely, 2^721970496 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 721970496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1155884912).

721970496 is an abundant number, since it is smaller than the sum of its proper divisors (1589799328).

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

721970496 is a wasteful number, since it uses less digits than its factorization.

721970496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611 (or 3589 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 721970496 is about 26869.5086668886. The cubic root of 721970496 is about 897.0978517652.

The spelling of 721970496 in words is "seven hundred twenty-one million, nine hundred seventy thousand, four hundred ninety-six".