864387 has 6 divisors (see below), whose sum is σ = 1248572. Its totient is φ = 576252.

The previous prime is 864379. The next prime is 864407. The reversal of 864387 is 783468.

864387 is a `hidden beast` number, since 8 + 643 + 8 + 7 = 666.

It is not a de Polignac number, because 864387 - 2³ = 864379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48013 + ... + 48030.

2⁸⁶⁴³⁸⁷ is an apocalyptic number.

864387 is a deficient number, since it is larger than the sum of its proper divisors (384185).

864387 is a wasteful number, since it uses less digits than its factorization.

864387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96049 (or 96046 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 864387 is about 929.7241526388. The cubic root of 864387 is about 95.2582814632.

The spelling of 864387 in words is "eight hundred sixty-four thousand, three hundred eighty-seven".