635670 has 48 divisors (see below), whose sum is σ = 1890720. Its totient is φ = 145152.

The previous prime is 635659. The next prime is 635689. The reversal of 635670 is 76536.

635670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126 + ... + 1134.

It is an arithmetic number, because the mean of its divisors is an integer number (39390).

2⁶³⁵⁶⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 635670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945360).

635670 is an abundant number, since it is smaller than the sum of its proper divisors (1255050).

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

635670 is a wasteful number, since it uses less digits than its factorization.

635670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1026 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 635670 is about 797.2891570817. The cubic root of 635670 is about 85.9825996886.

The spelling of 635670 in words is "six hundred thirty-five thousand, six hundred seventy".