634858 has 16 divisors (see below), whose sum is σ = 1099584. Its totient is φ = 269280.

The previous prime is 634853. The next prime is 634859. The reversal of 634858 is 858436.

It is not an unprimeable number, because it can be changed into a prime (634853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1753 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (68724).

2⁶³⁴⁸⁵⁸ is an apocalyptic number.

634858 is a deficient number, since it is larger than the sum of its proper divisors (464726).

634858 is a wasteful number, since it uses less digits than its factorization.

634858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477.

The product of its digits is 23040, while the sum is 34.

The square root of 634858 is about 796.7797688195. The cubic root of 634858 is about 85.9459729167.

The spelling of 634858 in words is "six hundred thirty-four thousand, eight hundred fifty-eight".