634688474 has 24 divisors (see below), whose sum is σ = 1108467828. Its totient is φ = 271763520.

The previous prime is 634688443. The next prime is 634688477. The reversal of 634688474 is 474886436.

It can be written as a sum of positive squares in 2 ways, for example, as 634687249 + 1225 = 25193^2 + 35^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (634688477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142952 + ... + 147324.

Almost surely, 2^634688474 is an apocalyptic number.

634688474 is a deficient number, since it is larger than the sum of its proper divisors (473779354).

634688474 is a wasteful number, since it uses less digits than its factorization.

634688474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870 (or 5863 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 50.

The square root of 634688474 is about 25193.0243122972. The cubic root of 634688474 is about 859.3832219053.

The spelling of 634688474 in words is "six hundred thirty-four million, six hundred eighty-eight thousand, four hundred seventy-four".