866938 has 4 divisors (see below), whose sum is σ = 1300410. Its totient is φ = 433468.

The previous prime is 866933. The next prime is 866941. The reversal of 866938 is 839668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 815409 + 51529 = 903^2 + 227^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 866938.

It is not an unprimeable number, because it can be changed into a prime (866933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216733 + ... + 216736.

2⁸⁶⁶⁹³⁸ is an apocalyptic number.

866938 is a deficient number, since it is larger than the sum of its proper divisors (433472).

866938 is a wasteful number, since it uses less digits than its factorization.

866938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433471.

The product of its digits is 62208, while the sum is 40.

The square root of 866938 is about 931.0950542238. The cubic root of 866938 is about 95.3518989494.

The spelling of 866938 in words is "eight hundred sixty-six thousand, nine hundred thirty-eight".