864633 has 32 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 423360.

The previous prime is 864631. The next prime is 864641. The reversal of 864633 is 336468.

It is not a de Polignac number, because 864633 - 2¹ = 864631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864633.

It is not an unprimeable number, because it can be changed into a prime (864631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4291 + ... + 4487.

It is an arithmetic number, because the mean of its divisors is an integer number (47520).

2⁸⁶⁴⁶³³ is an apocalyptic number.

It is an amenable number.

864633 is a deficient number, since it is larger than the sum of its proper divisors (656007).

864633 is a wasteful number, since it uses less digits than its factorization.

864633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its digits is 10368, while the sum is 30.

The square root of 864633 is about 929.8564405326. The cubic root of 864633 is about 95.2673172749.

The spelling of 864633 in words is "eight hundred sixty-four thousand, six hundred thirty-three".