720921600 has 528 divisors, whose sum is σ = 3045936000. Its totient is φ = 163676160.

The previous prime is 720921599. The next prime is 720921611. The reversal of 720921600 is 6129027.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 47 ways as a sum of consecutive naturals, for example, 4838326 + ... + 4838474.

Almost surely, 2^720921600 is an apocalyptic number.

720921600 is a gapful number since it is divisible by the number (70) 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 720921600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1522968000).

720921600 is an abundant number, since it is smaller than the sum of its proper divisors (2325014400).

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

720921600 is a wasteful number, since it uses less digits than its factorization.

720921600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 720921600 is about 26849.9832402182. The cubic root of 720921600 is about 896.6631994694.

The spelling of 720921600 in words is "seven hundred twenty million, nine hundred twenty-one thousand, six hundred".