868406 has 16 divisors (see below), whose sum is σ = 1624320. Its totient is φ = 338280.

The previous prime is 868397. The next prime is 868409. The reversal of 868406 is 604868.

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868406.

It is not an unprimeable number, because it can be changed into a prime (868409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2666 + ... + 2973.

It is an arithmetic number, because the mean of its divisors is an integer number (101520).

2⁸⁶⁸⁴⁰⁶ is an apocalyptic number.

868406 is a deficient number, since it is larger than the sum of its proper divisors (755914).

868406 is a wasteful number, since it uses less digits than its factorization.

868406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 868406 is about 931.8830398714. The cubic root of 868406 is about 95.4056888989.

The spelling of 868406 in words is "eight hundred sixty-eight thousand, four hundred six".