40185008 has 20 divisors (see below), whose sum is σ = 82438920. Its totient is φ = 18910464.

The previous prime is 40185001. The next prime is 40185011. The reversal of 40185008 is 80058104.

It is a super-2 number, since 2×40185008² = 3229669735920128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40185001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 73598 + ... + 74141.

It is an arithmetic number, because the mean of its divisors is an integer number (4121946).

Almost surely, 2^40185008 is an apocalyptic number.

It is an amenable number.

40185008 is an abundant number, since it is smaller than the sum of its proper divisors (42253912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40185008 is a wasteful number, since it uses less digits than its factorization.

40185008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147764 (or 147758 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 40185008 is about 6339.1646137326. The cubic root of 40185008 is about 342.5216438983.

The spelling of 40185008 in words is "forty million, one hundred eighty-five thousand, eight".