862866 has 48 divisors (see below), whose sum is σ = 2090400. Its totient is φ = 263088.

The previous prime is 862861. The next prime is 862879. The reversal of 862866 is 668268.

It is a self number, because there is not a number n which added to its sum of digits gives 862866.

It is not an unprimeable number, because it can be changed into a prime (862861) by changing a digit.

862866 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 23 ways as a sum of consecutive naturals, for example, 29740 + ... + 29768.

It is an arithmetic number, because the mean of its divisors is an integer number (43550).

2⁸⁶²⁸⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 862866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1045200).

862866 is an abundant number, since it is smaller than the sum of its proper divisors (1227534).

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

862866 is a wasteful number, since it uses less digits than its factorization.

862866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 53 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 862866 is about 928.9058079267. The cubic root of 862866 is about 95.2023755969.

It can be divided in two parts, 862 and 866, that added together give a cube (1728 = 12³).

The spelling of 862866 in words is "eight hundred sixty-two thousand, eight hundred sixty-six".