721300800 has 336 divisors, whose sum is σ = 2721254400. Its totient is φ = 165427200.

The previous prime is 721300771. The next prime is 721300807. The reversal of 721300800 is 8003127.

721300800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721300807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1002841 + ... + 1003559.

Almost surely, 2^721300800 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 721300800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1360627200).

721300800 is an abundant number, since it is smaller than the sum of its proper divisors (1999953600).

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

721300800 is a wasteful number, since it uses less digits than its factorization.

721300800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 721300800 is about 26857.0437688142. The cubic root of 721300800 is about 896.8203848867.

Adding to 721300800 its reverse (8003127), we get a palindrome (729303927).

The spelling of 721300800 in words is "seven hundred twenty-one million, three hundred thousand, eight hundred".