864408 has 16 divisors (see below), whose sum is σ = 2161080. Its totient is φ = 288128.

The previous prime is 864407. The next prime is 864419. The reversal of 864408 is 804468.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17985 + ... + 18032.

2⁸⁶⁴⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

864408 is an abundant number, since it is smaller than the sum of its proper divisors (1296672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864408 is a wasteful number, since it uses less digits than its factorization.

864408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36026 (or 36022 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 864408 is about 929.7354462426. The cubic root of 864408 is about 95.2590528799.

The spelling of 864408 in words is "eight hundred sixty-four thousand, four hundred eight".