40019085 has 12 divisors (see below), whose sum is σ = 69366492. Its totient is φ = 21343488.

The previous prime is 40019041. The next prime is 40019123. The reversal of 40019085 is 58091004.

It can be written as a sum of positive squares in 2 ways, for example, as 31741956 + 8277129 = 5634^2 + 2877^2 .

It is not a de Polignac number, because 40019085 - 2¹⁰ = 40018061 is a prime.

It is a Curzon number.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 444612 + ... + 444701.

It is an arithmetic number, because the mean of its divisors is an integer number (5780541).

Almost surely, 2^40019085 is an apocalyptic number.

40019085 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40019085 is a deficient number, since it is larger than the sum of its proper divisors (29347407).

40019085 is a wasteful number, since it uses less digits than its factorization.

40019085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889324 (or 889321 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 40019085 is about 6326.0639421365. The cubic root of 40019085 is about 342.0495721720.

The spelling of 40019085 in words is "forty million, nineteen thousand, eighty-five".