634728736 has 24 divisors (see below), whose sum is σ = 1252703340. Its totient is φ = 316581888.

The previous prime is 634728727. The next prime is 634728737. The reversal of 634728736 is 637827436.

It can be written as a sum of positive squares in 2 ways, for example, as 632824336 + 1904400 = 25156^2 + 1380^2 .

It is not an unprimeable number, because it can be changed into a prime (634728737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11161 + ... + 37336.

Almost surely, 2^634728736 is an apocalyptic number.

It is an amenable number.

634728736 is a deficient number, since it is larger than the sum of its proper divisors (617974604).

634728736 is a wasteful number, since it uses less digits than its factorization.

634728736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48916 (or 48908 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 46.

The square root of 634728736 is about 25193.8233700246. The cubic root of 634728736 is about 859.4013934215.

The spelling of 634728736 in words is "six hundred thirty-four million, seven hundred twenty-eight thousand, seven hundred thirty-six".