634408 has 8 divisors (see below), whose sum is σ = 1189530. Its totient is φ = 317200.

The previous prime is 634397. The next prime is 634421. The reversal of 634408 is 804436.

It can be written as a sum of positive squares in only one way, i.e., 459684 + 174724 = 678^2 + 418^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39643 + ... + 39658.

2⁶³⁴⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

634408 is a deficient number, since it is larger than the sum of its proper divisors (555122).

634408 is a wasteful number, since it uses less digits than its factorization.

634408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79307 (or 79303 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 634408 is about 796.4973320734. The cubic root of 634408 is about 85.9256613775.

The spelling of 634408 in words is "six hundred thirty-four thousand, four hundred eight".