635564 has 12 divisors (see below), whose sum is σ = 1150800. Its totient is φ = 306768.

The previous prime is 635563. The next prime is 635567. The reversal of 635564 is 465536.

635564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (635563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2624 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (95900).

2⁶³⁵⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

635564 is a deficient number, since it is larger than the sum of its proper divisors (515236).

635564 is a wasteful number, since it uses less digits than its factorization.

635564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5512 (or 5510 counting only the distinct ones).

The product of its digits is 10800, while the sum is 29.

The square root of 635564 is about 797.2226790552. Note that the first 3 decimals coincide. The cubic root of 635564 is about 85.9778201320.

The spelling of 635564 in words is "six hundred thirty-five thousand, five hundred sixty-four".