864398 has 4 divisors (see below), whose sum is σ = 1296600. Its totient is φ = 432198.

The previous prime is 864379. The next prime is 864407. The reversal of 864398 is 893468.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216098 + ... + 216101.

It is an arithmetic number, because the mean of its divisors is an integer number (324150).

2⁸⁶⁴³⁹⁸ is an apocalyptic number.

864398 is a deficient number, since it is larger than the sum of its proper divisors (432202).

864398 is a wasteful number, since it uses less digits than its factorization.

864398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432201.

The product of its digits is 41472, while the sum is 38.

The square root of 864398 is about 929.7300683532. The cubic root of 864398 is about 95.2586855402.

The spelling of 864398 in words is "eight hundred sixty-four thousand, three hundred ninety-eight".