40505185 has 32 divisors (see below), whose sum is σ = 58908672. Its totient is φ = 26136000.

The previous prime is 40505173. The next prime is 40505209. The reversal of 40505185 is 58150504.

It is not a de Polignac number, because 40505185 - 2¹¹ = 40503137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53560 + ... + 54310.

It is an arithmetic number, because the mean of its divisors is an integer number (1840896).

Almost surely, 2^40505185 is an apocalyptic number.

It is an amenable number.

40505185 is a deficient number, since it is larger than the sum of its proper divisors (18403487).

40505185 is a wasteful number, since it uses less digits than its factorization.

40505185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 40505185 is about 6364.3683897147. The cubic root of 40505185 is about 343.4289273094.

Adding to 40505185 its reverse (58150504), we get a palindrome (98655689).

The spelling of 40505185 in words is "forty million, five hundred five thousand, one hundred eighty-five".