40805185 has 8 divisors (see below), whose sum is σ = 51846696. Its totient is φ = 30723840.

The previous prime is 40805161. The next prime is 40805189. The reversal of 40805185 is 58150804.

It can be written as a sum of positive squares in 4 ways, for example, as 571536 + 40233649 = 756^2 + 6343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40805185 - 2¹¹ = 40803137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40805189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239946 + ... + 240115.

It is an arithmetic number, because the mean of its divisors is an integer number (6480837).

Almost surely, 2^40805185 is an apocalyptic number.

It is an amenable number.

40805185 is a deficient number, since it is larger than the sum of its proper divisors (11041511).

40805185 is a wasteful number, since it uses less digits than its factorization.

40805185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480083.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 40805185 is about 6387.8936277931. The cubic root of 40805185 is about 344.2747067689.

Adding to 40805185 its reverse (58150804), we get a palindrome (98955989).

The spelling of 40805185 in words is "forty million, eight hundred five thousand, one hundred eighty-five".