866349 has 16 divisors (see below), whose sum is σ = 1400640. Its totient is φ = 524880.

The previous prime is 866329. The next prime is 866353. The reversal of 866349 is 943668.

866349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 866349 - 2⁷ = 866221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162 + ... + 1755.

It is an arithmetic number, because the mean of its divisors is an integer number (87540).

2⁸⁶⁶³⁴⁹ is an apocalyptic number.

It is an amenable number.

866349 is a deficient number, since it is larger than the sum of its proper divisors (534291).

866349 is a wasteful number, since it uses less digits than its factorization.

866349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937 (or 2931 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 866349 is about 930.7787062455. The cubic root of 866349 is about 95.3302999453.

The spelling of 866349 in words is "eight hundred sixty-six thousand, three hundred forty-nine".