720825816 has 32 divisors (see below), whose sum is σ = 1809259200. Its totient is φ = 239316000.

The previous prime is 720825799. The next prime is 720825817. The reversal of 720825816 is 618528027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720825817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53806 + ... + 65853.

It is an arithmetic number, because the mean of its divisors is an integer number (56539350).

Almost surely, 2^720825816 is an apocalyptic number.

It is an amenable number.

720825816 is an abundant number, since it is smaller than the sum of its proper divisors (1088433384).

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

720825816 is a wasteful number, since it uses less digits than its factorization.

720825816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119919 (or 119915 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 720825816 is about 26848.1994927034. The cubic root of 720825816 is about 896.6234865095.

The spelling of 720825816 in words is "seven hundred twenty million, eight hundred twenty-five thousand, eight hundred sixteen".