40185238 has 16 divisors (see below), whose sum is σ = 62384256. Its totient is φ = 19393920.

The previous prime is 40185227. The next prime is 40185281. The reversal of 40185238 is 83258104.

40185238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40185238² = 3229706706233288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36220 + ... + 37312.

It is an arithmetic number, because the mean of its divisors is an integer number (3899016).

Almost surely, 2^40185238 is an apocalyptic number.

40185238 is a deficient number, since it is larger than the sum of its proper divisors (22199018).

40185238 is a wasteful number, since it uses less digits than its factorization.

40185238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 40185238 is about 6339.1827548983. The cubic root of 40185238 is about 342.5222973744.

The spelling of 40185238 in words is "forty million, one hundred eighty-five thousand, two hundred thirty-eight".