634658 has 8 divisors (see below), whose sum is σ = 956928. Its totient is φ = 315684.

The previous prime is 634651. The next prime is 634679. The reversal of 634658 is 856436.

634658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 634658.

It is not an unprimeable number, because it can be changed into a prime (634651) by changing a digit.

634658 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 3 ways as a sum of consecutive naturals, for example, 266 + ... + 1157.

It is an arithmetic number, because the mean of its divisors is an integer number (119616).

2⁶³⁴⁶⁵⁸ is an apocalyptic number.

634658 is a deficient number, since it is larger than the sum of its proper divisors (322270).

634658 is a wasteful number, since it uses less digits than its factorization.

634658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648.

The product of its digits is 17280, while the sum is 32.

The square root of 634658 is about 796.6542537387. The cubic root of 634658 is about 85.9369467513.

The spelling of 634658 in words is "six hundred thirty-four thousand, six hundred fifty-eight".