40109185 has 16 divisors (see below), whose sum is σ = 49047120. Its totient is φ = 31482880.

The previous prime is 40109183. The next prime is 40109197. The reversal of 40109185 is 58190104.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 456976 + 39652209 = 676^2 + 6297^2 .

It is not a de Polignac number, because 40109185 - 2¹ = 40109183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40109183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76725 + ... + 77245.

It is an arithmetic number, because the mean of its divisors is an integer number (3065445).

Almost surely, 2^40109185 is an apocalyptic number.

It is an amenable number.

40109185 is a deficient number, since it is larger than the sum of its proper divisors (8937935).

40109185 is a wasteful number, since it uses less digits than its factorization.

40109185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 40109185 is about 6333.1812701043. The cubic root of 40109185 is about 342.3060795084.

Adding to 40109185 its reverse (58190104), we get a palindrome (98299289).

The spelling of 40109185 in words is "forty million, one hundred nine thousand, one hundred eighty-five".