78285 has 16 divisors (see below), whose sum is σ = 133056. Its totient is φ = 39168.

The previous prime is 78283. The next prime is 78301. The reversal of 78285 is 58287.

It is not a de Polignac number, because 78285 - 2¹ = 78283 is a prime.

It is a super-2 number, since 2×78285² = 12257082450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102 + ... + 408.

It is an arithmetic number, because the mean of its divisors is an integer number (8316).

2⁷⁸²⁸⁵ is an apocalyptic number.

It is an amenable number.

78285 is a deficient number, since it is larger than the sum of its proper divisors (54771).

78285 is a wasteful number, since it uses less digits than its factorization.

78285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332.

The product of its digits is 4480, while the sum is 30.

The square root of 78285 is about 279.7945674955. The cubic root of 78285 is about 42.7785623564.

It can be divided in two parts, 78 and 285, that added together give a palindrome (363).

The spelling of 78285 in words is "seventy-eight thousand, two hundred eighty-five".