868440 has 32 divisors (see below), whose sum is σ = 2605680. Its totient is φ = 231552.

The previous prime is 868423. The next prime is 868451. The reversal of 868440 is 44868.

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 = 868398 and 868407.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868440.

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, 3499 + ... + 3738.

2⁸⁶⁸⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

868440 is an abundant number, since it is smaller than the sum of its proper divisors (1737240).

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

868440 is a wasteful number, since it uses less digits than its factorization.

868440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7251 (or 7247 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 868440 is about 931.9012823255. The cubic root of 868440 is about 95.4069339967.

The spelling of 868440 in words is "eight hundred sixty-eight thousand, four hundred forty".