40138468 has 12 divisors (see below), whose sum is σ = 71089200. Its totient is φ = 19827272.

The previous prime is 40138457. The next prime is 40138471. The reversal of 40138468 is 86483104.

40138468 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 2×40138468² = 3222193226774048, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 60118 + ... + 60781.

It is an arithmetic number, because the mean of its divisors is an integer number (5924100).

Almost surely, 2^40138468 is an apocalyptic number.

It is an amenable number.

40138468 is a deficient number, since it is larger than the sum of its proper divisors (30950732).

40138468 is a wasteful number, since it uses less digits than its factorization.

40138468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120986 (or 120984 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 40138468 is about 6335.4927195917. The cubic root of 40138468 is about 342.3893630965.

The spelling of 40138468 in words is "forty million, one hundred thirty-eight thousand, four hundred sixty-eight".