868442 has 4 divisors (see below), whose sum is σ = 1302666. Its totient is φ = 434220.

The previous prime is 868423. The next prime is 868451. The reversal of 868442 is 244868.

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., 866761 + 1681 = 931^2 + 41^2 .

It is a junction number, because it is equal to n+sod(n) for n = 868399 and 868408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217109 + ... + 217112.

2⁸⁶⁸⁴⁴² is an apocalyptic number.

868442 is a deficient number, since it is larger than the sum of its proper divisors (434224).

868442 is a wasteful number, since it uses less digits than its factorization.

868442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434223.

The product of its digits is 12288, while the sum is 32.

The square root of 868442 is about 931.9023554000. The cubic root of 868442 is about 95.4070072367.

The spelling of 868442 in words is "eight hundred sixty-eight thousand, four hundred forty-two".