40185285 has 32 divisors (see below), whose sum is σ = 77352960. Its totient is φ = 17402688.

The previous prime is 40185283. The next prime is 40185307. The reversal of 40185285 is 58258104.

40185285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40185285 - 2¹ = 40185283 is a prime.

It is a super-2 number, since 2×40185285² = 3229714261062450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40185281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8077 + ... + 12066.

It is an arithmetic number, because the mean of its divisors is an integer number (2417280).

Almost surely, 2^40185285 is an apocalyptic number.

It is an amenable number.

40185285 is a deficient number, since it is larger than the sum of its proper divisors (37167675).

40185285 is a wasteful number, since it uses less digits than its factorization.

40185285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20177.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 40185285 is about 6339.1864619997. The cubic root of 40185285 is about 342.5224309106.

It can be divided in two parts, 40185 and 285, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 40185285 in words is "forty million, one hundred eighty-five thousand, two hundred eighty-five".