866274 has 8 divisors (see below), whose sum is σ = 1732560. Its totient is φ = 288756.

The previous prime is 866231. The next prime is 866279. The reversal of 866274 is 472668.

It is a sphenic number, since it is the product of 3 distinct primes.

866274 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (866279) by changing a digit.

866274 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 3 ways as a sum of consecutive naturals, for example, 72184 + ... + 72195.

It is an arithmetic number, because the mean of its divisors is an integer number (216570).

2⁸⁶⁶²⁷⁴ is an apocalyptic number.

866274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

866274 is a wasteful number, since it uses less digits than its factorization.

866274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144384.

The product of its digits is 16128, while the sum is 33.

The square root of 866274 is about 930.7384165274. The cubic root of 866274 is about 95.3275489451.

The spelling of 866274 in words is "eight hundred sixty-six thousand, two hundred seventy-four".