731858768 has 30 divisors (see below), whose sum is σ = 1446287454. Its totient is φ = 358638592.

The previous prime is 731858747. The next prime is 731858773. The reversal of 731858768 is 867858137.

It can be written as a sum of positive squares in 3 ways, for example, as 14047504 + 717811264 = 3748^2 + 26792^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 787328 + ... + 788256.

Almost surely, 2^731858768 is an apocalyptic number.

It is an amenable number.

731858768 is a deficient number, since it is larger than the sum of its proper divisors (714428686).

731858768 is an frugal number, since it uses more digits than its factorization.

731858768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919 (or 984 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 53.

The square root of 731858768 is about 27052.8883485664. Note that the first 3 decimals coincide. The cubic root of 731858768 is about 901.1749132679.

Multiplying 731858768 by its sum of digits (53), we get a square (38788514704 = 196948²).

731858768 divided by its sum of digits (53) gives a square (13808656 = 3716²).

The spelling of 731858768 in words is "seven hundred thirty-one million, eight hundred fifty-eight thousand, seven hundred sixty-eight".