40438185 has 16 divisors (see below), whose sum is σ = 65668416. Its totient is φ = 21244608.

The previous prime is 40438169. The next prime is 40438199. The reversal of 40438185 is 58183404.

It is not a de Polignac number, because 40438185 - 2⁴ = 40438169 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19114 + ... + 21123.

It is an arithmetic number, because the mean of its divisors is an integer number (4104276).

Almost surely, 2^40438185 is an apocalyptic number.

It is an amenable number.

40438185 is a deficient number, since it is larger than the sum of its proper divisors (25230231).

40438185 is a wasteful number, since it uses less digits than its factorization.

40438185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40312.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 40438185 is about 6359.1025310180. The cubic root of 40438185 is about 343.2394664895.

The spelling of 40438185 in words is "forty million, four hundred thirty-eight thousand, one hundred eighty-five".