721943376 has 160 divisors (see below), whose sum is σ = 2400608256. Its totient is φ = 181440000.

The previous prime is 721943353. The next prime is 721943381. The reversal of 721943376 is 673349127.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111426 + ... + 117726.

Almost surely, 2^721943376 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 721943376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1200304128).

721943376 is an abundant number, since it is smaller than the sum of its proper divisors (1678664880).

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

721943376 is a wasteful number, since it uses less digits than its factorization.

721943376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6361 (or 6355 counting only the distinct ones).

The product of its digits is 190512, while the sum is 42.

The square root of 721943376 is about 26869.0040008929. The cubic root of 721943376 is about 897.0866188046.

The spelling of 721943376 in words is "seven hundred twenty-one million, nine hundred forty-three thousand, three hundred seventy-six".