875640 has 32 divisors (see below), whose sum is σ = 2627280. Its totient is φ = 233472.

The previous prime is 875629. The next prime is 875647. The reversal of 875640 is 46578.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 875598 and 875607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (875647) by changing a digit.

875640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529 + ... + 3768.

2⁸⁷⁵⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

875640 is an abundant number, since it is smaller than the sum of its proper divisors (1751640).

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

875640 is a wasteful number, since it uses less digits than its factorization.

875640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7311 (or 7307 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 875640 is about 935.7563785516. The cubic root of 875640 is about 95.6698729974.

The spelling of 875640 in words is "eight hundred seventy-five thousand, six hundred forty".