535644 has 18 divisors (see below), whose sum is σ = 1354080. Its totient is φ = 178536.

The previous prime is 535637. The next prime is 535663. The reversal of 535644 is 446535.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7404 + ... + 7475.

2⁵³⁵⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

535644 is an abundant number, since it is smaller than the sum of its proper divisors (818436).

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

535644 is a wasteful number, since it uses less digits than its factorization.

535644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14889 (or 14884 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 535644 is about 731.8770388528. The cubic root of 535644 is about 81.2129740567.

The spelling of 535644 in words is "five hundred thirty-five thousand, six hundred forty-four".