864386 has 24 divisors (see below), whose sum is σ = 1459920. Its totient is φ = 382536.

The previous prime is 864379. The next prime is 864407. The reversal of 864386 is 683468.

It is a super-3 number, since 3×864386³ = 1937512117869433368, which contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 20081 + ... + 20123.

It is an arithmetic number, because the mean of its divisors is an integer number (60830).

2⁸⁶⁴³⁸⁶ is an apocalyptic number.

864386 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

864386 is a deficient number, since it is larger than the sum of its proper divisors (595534).

864386 is a wasteful number, since it uses less digits than its factorization.

864386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 87 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 864386 is about 929.7236148448. The cubic root of 864386 is about 95.2582447287.

The spelling of 864386 in words is "eight hundred sixty-four thousand, three hundred eighty-six".