866888 has 16 divisors (see below), whose sum is σ = 1773360. Its totient is φ = 394000.

The previous prime is 866869. The next prime is 866909. The reversal of 866888 is 888668.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4838 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (110835).

2⁸⁶⁶⁸⁸⁸ is an apocalyptic number.

866888 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

866888 is an abundant number, since it is smaller than the sum of its proper divisors (906472).

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

866888 is a wasteful number, since it uses less digits than its factorization.

866888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9868 (or 9864 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 866888 is about 931.0682037316. The cubic root of 866888 is about 95.3500657977.

The spelling of 866888 in words is "eight hundred sixty-six thousand, eight hundred eighty-eight".