721364336 has 80 divisors (see below), whose sum is σ = 1834287360. Its totient is φ = 266250240.

The previous prime is 721364243. The next prime is 721364363. The reversal of 721364336 is 633463127.

It is a junction number, because it is equal to n+sod(n) for n = 721364296 and 721364305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8000 + ... + 38816.

It is an arithmetic number, because the mean of its divisors is an integer number (22928592).

Almost surely, 2^721364336 is an apocalyptic number.

721364336 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721364336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917143680).

721364336 is an abundant number, since it is smaller than the sum of its proper divisors (1112923024).

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

721364336 is a wasteful number, since it uses less digits than its factorization.

721364336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30862 (or 30856 counting only the distinct ones).

The product of its digits is 54432, while the sum is 35.

The square root of 721364336 is about 26858.2265981952. The cubic root of 721364336 is about 896.8467163455.

The spelling of 721364336 in words is "seven hundred twenty-one million, three hundred sixty-four thousand, three hundred thirty-six".