40285 has 8 divisors (see below), whose sum is σ = 55296. Its totient is φ = 27600.

The previous prime is 40283. The next prime is 40289. The reversal of 40285 is 58204.

40285 = 8² + 9² + ... + 49².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40285 - 2¹ = 40283 is a prime.

It is a super-3 number, since 3×40285³ = 196133310447375, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541 + ... + 610.

It is an arithmetic number, because the mean of its divisors is an integer number (6912).

2⁴⁰²⁸⁵ is an apocalyptic number.

It is an amenable number.

40285 is a deficient number, since it is larger than the sum of its proper divisors (15011).

40285 is a wasteful number, since it uses less digits than its factorization.

40285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 40285 is about 200.7112353607. The cubic root of 40285 is about 34.2805506443.

Adding to 40285 its sum of digits (19), we get a palindrome (40304).

Adding to 40285 its reverse (58204), we get a palindrome (98489).

It can be divided in two parts, 40 and 285, that added together give a triangular number (325 = T₂₅).

The spelling of 40285 in words is "forty thousand, two hundred eighty-five".