720775431 has 24 divisors (see below), whose sum is σ = 1103310000. Its totient is φ = 452155392.

The previous prime is 720775427. The next prime is 720775459. The reversal of 720775431 is 134577027.

720775431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 720775431 - 2² = 720775427 is a prime.

It is a super-2 number, since 2×720775431² = 1039034443866471522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720775411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11335 + ... + 39623.

It is an arithmetic number, because the mean of its divisors is an integer number (45971250).

Almost surely, 2^720775431 is an apocalyptic number.

720775431 is a deficient number, since it is larger than the sum of its proper divisors (382534569).

720775431 is a wasteful number, since it uses less digits than its factorization.

720775431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28463 (or 28460 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 720775431 is about 26847.2611452267. The cubic root of 720775431 is about 896.6025949959.

The spelling of 720775431 in words is "seven hundred twenty million, seven hundred seventy-five thousand, four hundred thirty-one".