285764 has 12 divisors (see below), whose sum is σ = 504000. Its totient is φ = 141768.

The previous prime is 285763. The next prime is 285767. The reversal of 285764 is 467582.

It is a super-2 number, since 2×285764² = 163322127392, which contains 22 as substring.

It is an Ulam number.

Its product of digits (13440) is a multiple of the sum of its prime divisors (560).

It is a self number, because there is not a number n which added to its sum of digits gives 285764.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285764.

It is not an unprimeable number, because it can be changed into a prime (285763) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 617 + ... + 975.

It is an arithmetic number, because the mean of its divisors is an integer number (42000).

2²⁸⁵⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

285764 is a deficient number, since it is larger than the sum of its proper divisors (218236).

285764 is a wasteful number, since it uses less digits than its factorization.

285764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 560 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 285764 is about 534.5689852582. The cubic root of 285764 is about 65.8671954551.

The spelling of 285764 in words is "two hundred eighty-five thousand, seven hundred sixty-four".