634775138 has 32 divisors (see below), whose sum is σ = 1036364544. Its totient is φ = 290449152.

The previous prime is 634775131. The next prime is 634775149. The reversal of 634775138 is 831577436.

It is not an unprimeable number, because it can be changed into a prime (634775131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259256 + ... + 261692.

It is an arithmetic number, because the mean of its divisors is an integer number (32386392).

Almost surely, 2^634775138 is an apocalyptic number.

634775138 is a deficient number, since it is larger than the sum of its proper divisors (401589406).

634775138 is a wasteful number, since it uses less digits than its factorization.

634775138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666.

The product of its digits is 423360, while the sum is 44.

The square root of 634775138 is about 25194.7442535145. The cubic root of 634775138 is about 859.4223351611.

The spelling of 634775138 in words is "six hundred thirty-four million, seven hundred seventy-five thousand, one hundred thirty-eight".