40402085 has 4 divisors (see below), whose sum is σ = 48482508. Its totient is φ = 32321664.

The previous prime is 40402067. The next prime is 40402091. The reversal of 40402085 is 58020404.

40402085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26030404 + 14371681 = 5102^2 + 3791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40402085 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 40402085.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4040204 + ... + 4040213.

It is an arithmetic number, because the mean of its divisors is an integer number (12120627).

Almost surely, 2^40402085 is an apocalyptic number.

It is an amenable number.

40402085 is a deficient number, since it is larger than the sum of its proper divisors (8080423).

40402085 is an equidigital number, since it uses as much as digits as its factorization.

40402085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080422.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 40402085 is about 6356.2634463968. The cubic root of 40402085 is about 343.1372971020.

Adding to 40402085 its reverse (58020404), we get a palindrome (98422489).

The spelling of 40402085 in words is "forty million, four hundred two thousand, eighty-five".