40190838 has 16 divisors (see below), whose sum is σ = 80445936. Its totient is φ = 13386240.

The previous prime is 40190837. The next prime is 40190851. The reversal of 40190838 is 83809104.

40190838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40190799 and 40190808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40190831) 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, 10278 + ... + 13638.

It is an arithmetic number, because the mean of its divisors is an integer number (5027871).

Almost surely, 2^40190838 is an apocalyptic number.

40190838 is an abundant number, since it is smaller than the sum of its proper divisors (40255098).

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

40190838 is a wasteful number, since it uses less digits than its factorization.

40190838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 40190838 is about 6339.6244368259. The cubic root of 40190838 is about 342.5382073277.

The spelling of 40190838 in words is "forty million, one hundred ninety thousand, eight hundred thirty-eight".