634660 has 24 divisors (see below), whose sum is σ = 1435896. Its totient is φ = 234240.

The previous prime is 634651. The next prime is 634679. The reversal of 634660 is 66436.

It is a happy number.

634660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 627264 = 86^2 + 792^2 .

It is an unprimeable number.

634660 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 7 ways as a sum of consecutive naturals, for example, 961 + ... + 1480.

It is an arithmetic number, because the mean of its divisors is an integer number (59829).

2⁶³⁴⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

634660 is an abundant number, since it is smaller than the sum of its proper divisors (801236).

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

634660 is a wasteful number, since it uses less digits than its factorization.

634660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463 (or 2461 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 634660 is about 796.6555089874. The cubic root of 634660 is about 85.9370370223.

The spelling of 634660 in words is "six hundred thirty-four thousand, six hundred sixty".