868408 has 16 divisors (see below), whose sum is σ = 1651680. Its totient is φ = 427968.

The previous prime is 868397. The next prime is 868409. The reversal of 868408 is 804868.

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160 + ... + 1327.

It is an arithmetic number, because the mean of its divisors is an integer number (103230).

2⁸⁶⁸⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

868408 is a deficient number, since it is larger than the sum of its proper divisors (783272).

868408 is a wasteful number, since it uses less digits than its factorization.

868408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566 (or 1562 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 868408 is about 931.8841129668. The cubic root of 868408 is about 95.4057621408.

The spelling of 868408 in words is "eight hundred sixty-eight thousand, four hundred eight".