634398 has 8 divisors (see below), whose sum is σ = 1268808. Its totient is φ = 211464.

The previous prime is 634397. The next prime is 634421. The reversal of 634398 is 893436.

It is a sphenic number, since it is the product of 3 distinct primes.

634398 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634397) 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 3 ways as a sum of consecutive naturals, for example, 52861 + ... + 52872.

It is an arithmetic number, because the mean of its divisors is an integer number (158601).

2⁶³⁴³⁹⁸ is an apocalyptic number.

634398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

634398 is a wasteful number, since it uses less digits than its factorization.

634398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105738.

The product of its digits is 15552, while the sum is 33.

The square root of 634398 is about 796.4910545637. The cubic root of 634398 is about 85.9252099009.

It can be divided in two parts, 6343 and 98, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 634398 in words is "six hundred thirty-four thousand, three hundred ninety-eight".