885640 has 32 divisors (see below), whose sum is σ = 2278080. Its totient is φ = 303552.

The previous prime is 885623. The next prime is 885679. The reversal of 885640 is 46588.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

885640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302 + ... + 1861.

It is an arithmetic number, because the mean of its divisors is an integer number (71190).

2⁸⁸⁵⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

885640 is an abundant number, since it is smaller than the sum of its proper divisors (1392440).

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

885640 is a wasteful number, since it uses less digits than its factorization.

885640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181 (or 3177 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 885640 is about 941.0844807986. The cubic root of 885640 is about 96.0326856293.

The spelling of 885640 in words is "eight hundred eighty-five thousand, six hundred forty".