40812585 has 64 divisors (see below), whose sum is σ = 75202560. Its totient is φ = 18720000.

The previous prime is 40812571. The next prime is 40812613. The reversal of 40812585 is 58521804.

It is not a de Polignac number, because 40812585 - 2⁵ = 40812553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 404035 + ... + 404135.

It is an arithmetic number, because the mean of its divisors is an integer number (1175040).

Almost surely, 2^40812585 is an apocalyptic number.

It is an amenable number.

40812585 is a deficient number, since it is larger than the sum of its proper divisors (34389975).

40812585 is a wasteful number, since it uses less digits than its factorization.

40812585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

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

The square root of 40812585 is about 6388.4728222009. The cubic root of 40812585 is about 344.2955168599.

It can be divided in two parts, 4081 and 2585, that added together give a palindrome (6666).

The spelling of 40812585 in words is "forty million, eight hundred twelve thousand, five hundred eighty-five".