720884791 has 16 divisors (see below), whose sum is σ = 822919680. Its totient is φ = 625093920.

The previous prime is 720884783. The next prime is 720884803. The reversal of 720884791 is 197488027.

It is not a de Polignac number, because 720884791 - 2³ = 720884783 is a prime.

It is a super-2 number, since 2×720884791² = 1039349763790227362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720884701) 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 15 ways as a sum of consecutive naturals, for example, 90550 + ... + 98188.

It is an arithmetic number, because the mean of its divisors is an integer number (51432480).

Almost surely, 2^720884791 is an apocalyptic number.

720884791 is a deficient number, since it is larger than the sum of its proper divisors (102034889).

720884791 is a wasteful number, since it uses less digits than its factorization.

720884791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8046.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 720884791 is about 26849.2977748022. The cubic root of 720884791 is about 896.6479385231.

The spelling of 720884791 in words is "seven hundred twenty million, eight hundred eighty-four thousand, seven hundred ninety-one".