40233985 has 32 divisors (see below), whose sum is σ = 57324672. Its totient is φ = 26772480.

The previous prime is 40233983. The next prime is 40234027. The reversal of 40233985 is 58933204.

It is a happy number.

It is not a de Polignac number, because 40233985 - 2¹ = 40233983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40233985.

It is not an unprimeable number, because it can be changed into a prime (40233983) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 34014 + ... + 35176.

It is an arithmetic number, because the mean of its divisors is an integer number (1791396).

Almost surely, 2^40233985 is an apocalyptic number.

It is an amenable number.

40233985 is a deficient number, since it is larger than the sum of its proper divisors (17090687).

40233985 is a wasteful number, since it uses less digits than its factorization.

40233985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 40233985 is about 6343.0264858347. The cubic root of 40233985 is about 342.6607411444.

It can be divided in two parts, 4023 and 3985, that added together give a palindrome (8008).

The spelling of 40233985 in words is "forty million, two hundred thirty-three thousand, nine hundred eighty-five".