634764 has 36 divisors (see below), whose sum is σ = 1608936. Its totient is φ = 194688.

The previous prime is 634759. The next prime is 634793. The reversal of 634764 is 467436.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 634764.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1872 + ... + 2184.

2⁶³⁴⁷⁶⁴ 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 634764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804468).

634764 is an abundant number, since it is smaller than the sum of its proper divisors (974172).

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

634764 is a wasteful number, since it uses less digits than its factorization.

634764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 331 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 634764 is about 796.7207791943. The cubic root of 634764 is about 85.9417308551.

The spelling of 634764 in words is "six hundred thirty-four thousand, seven hundred sixty-four".