40138168 has 32 divisors (see below), whose sum is σ = 86261760. Its totient is φ = 17151840.

The previous prime is 40138129. The next prime is 40138169. The reversal of 40138168 is 86183104.

40138168 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 2×40138168² = 3222145060792448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40138169) by changing a digit.

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, 23305 + ... + 24967.

It is an arithmetic number, because the mean of its divisors is an integer number (2695680).

Almost surely, 2^40138168 is an apocalyptic number.

It is an amenable number.

40138168 is an abundant number, since it is smaller than the sum of its proper divisors (46123592).

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

40138168 is a wasteful number, since it uses less digits than its factorization.

40138168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2103 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 40138168 is about 6335.4690434095. The cubic root of 40138168 is about 342.3885100739.

The spelling of 40138168 in words is "forty million, one hundred thirty-eight thousand, one hundred sixty-eight".