535640 has 32 divisors (see below), whose sum is σ = 1378080. Its totient is φ = 183552.

The previous prime is 535637. The next prime is 535663. The reversal of 535640 is 46535.

535640 = 39² + 40² + ... + 118².

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677 + ... + 1236.

It is an arithmetic number, because the mean of its divisors is an integer number (43065).

2⁵³⁵⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

535640 is an abundant number, since it is smaller than the sum of its proper divisors (842440).

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

535640 is a wasteful number, since it uses less digits than its factorization.

535640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 535640 is about 731.8743061483. The cubic root of 535640 is about 81.2127718996.

The spelling of 535640 in words is "five hundred thirty-five thousand, six hundred forty".