40440185 has 4 divisors (see below), whose sum is σ = 48528228. Its totient is φ = 32352144.

The previous prime is 40440157. The next prime is 40440203. The reversal of 40440185 is 58104404.

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 28440889 + 11999296 = 5333^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 40440185 - 2⁶ = 40440121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4044014 + ... + 4044023.

It is an arithmetic number, because the mean of its divisors is an integer number (12132057).

Almost surely, 2^40440185 is an apocalyptic number.

It is an amenable number.

40440185 is a deficient number, since it is larger than the sum of its proper divisors (8088043).

40440185 is an equidigital number, since it uses as much as digits as its factorization.

40440185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8088042.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 40440185 is about 6359.2597839686. The cubic root of 40440185 is about 343.2451250654.

Adding to 40440185 its reverse (58104404), we get a palindrome (98544589).

The spelling of 40440185 in words is "forty million, four hundred forty thousand, one hundred eighty-five".