634338 has 32 divisors (see below), whose sum is σ = 1494720. Its totient is φ = 198720.

The previous prime is 634331. The next prime is 634343. The reversal of 634338 is 833436.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (634331) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 573 + ... + 1263.

It is an arithmetic number, because the mean of its divisors is an integer number (46710).

2⁶³⁴³³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747360).

634338 is an abundant number, since it is smaller than the sum of its proper divisors (860382).

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

634338 is a wasteful number, since it uses less digits than its factorization.

634338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 713 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 634338 is about 796.4533884666. The cubic root of 634338 is about 85.9225009415.

The spelling of 634338 in words is "six hundred thirty-four thousand, three hundred thirty-eight".