634040 has 48 divisors (see below), whose sum is σ = 1580040. Its totient is φ = 228800.

The previous prime is 634031. The next prime is 634061. The reversal of 634040 is 40436.

634040 = T₂₂₉ + T₂₃₀ + ... + T₂₅₀.

634040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

634040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4775 + ... + 4905.

2⁶³⁴⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790020).

634040 is an abundant number, since it is smaller than the sum of its proper divisors (946000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634040 is a wasteful number, since it uses less digits than its factorization.

634040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 634040 is about 796.2662871176. The cubic root of 634040 is about 85.9090439118.

Adding to 634040 its reverse (40436), we get a palindrome (674476).

The spelling of 634040 in words is "six hundred thirty-four thousand, forty".