868424 has 8 divisors (see below), whose sum is σ = 1628310. Its totient is φ = 434208.

The previous prime is 868423. The next prime is 868451. The reversal of 868424 is 424868.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 145924 = 850^2 + 382^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (868423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54269 + ... + 54284.

2⁸⁶⁸⁴²⁴ is an apocalyptic number.

It is an amenable number.

868424 is a deficient number, since it is larger than the sum of its proper divisors (759886).

868424 is a wasteful number, since it uses less digits than its factorization.

868424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108559 (or 108555 counting only the distinct ones).

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

The square root of 868424 is about 931.8926976857. The cubic root of 868424 is about 95.4063480724.

Subtracting from 868424 its reverse (424868), we obtain a square (443556 = 666²).

The spelling of 868424 in words is "eight hundred sixty-eight thousand, four hundred twenty-four".