866898 has 24 divisors (see below), whose sum is σ = 1989468. Its totient is φ = 271872.

The previous prime is 866869. The next prime is 866909. The reversal of 866898 is 898668.

866898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 859329 + 7569 = 927^2 + 87^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1111 + ... + 1722.

2⁸⁶⁶⁸⁹⁸ is an apocalyptic number.

866898 is an abundant number, since it is smaller than the sum of its proper divisors (1122570).

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

866898 is a wasteful number, since it uses less digits than its factorization.

866898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858 (or 2855 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 866898 is about 931.0735738920. The cubic root of 866898 is about 95.3504324337.

It can be divided in two parts, 866 and 898, that added together give a square (1764 = 42²).

The spelling of 866898 in words is "eight hundred sixty-six thousand, eight hundred ninety-eight".