635620 has 24 divisors (see below), whose sum is σ = 1359288. Its totient is φ = 249600.

The previous prime is 635617. The next prime is 635639. The reversal of 635620 is 26536.

635620 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 5184 + 630436 = 72^2 + 794^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 635591 and 635600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960 + ... + 1480.

It is an arithmetic number, because the mean of its divisors is an integer number (56637).

2⁶³⁵⁶²⁰ is an apocalyptic number.

It is an amenable number.

635620 is an abundant number, since it is smaller than the sum of its proper divisors (723668).

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

635620 is a wasteful number, since it uses less digits than its factorization.

635620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 635620 is about 797.2578002127. The cubic root of 635620 is about 85.9803452470.

The spelling of 635620 in words is "six hundred thirty-five thousand, six hundred twenty".