720564870 has 32 divisors (see below), whose sum is σ = 1730842848. Its totient is φ = 191985408.

The previous prime is 720564851. The next prime is 720564877. The reversal of 720564870 is 78465027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720564877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27402 + ... + 46818.

It is an arithmetic number, because the mean of its divisors is an integer number (54088839).

Almost surely, 2^720564870 is an apocalyptic number.

720564870 is an abundant number, since it is smaller than the sum of its proper divisors (1010277978).

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

720564870 is a wasteful number, since it uses less digits than its factorization.

720564870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20664.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 720564870 is about 26843.3393973254. The cubic root of 720564870 is about 896.5152779585.

The spelling of 720564870 in words is "seven hundred twenty million, five hundred sixty-four thousand, eight hundred seventy".