40191886 has 16 divisors (see below), whose sum is σ = 68989536. Its totient is φ = 17202816.

The previous prime is 40191881. The next prime is 40191889. The reversal of 40191886 is 68819104.

It is a happy number.

40191886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40191881) 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, 14050 + ... + 16666.

It is an arithmetic number, because the mean of its divisors is an integer number (4311846).

Almost surely, 2^40191886 is an apocalyptic number.

40191886 is a deficient number, since it is larger than the sum of its proper divisors (28797650).

40191886 is a wasteful number, since it uses less digits than its factorization.

40191886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 40191886 is about 6339.7070910256. The cubic root of 40191886 is about 342.5411845976.

The spelling of 40191886 in words is "forty million, one hundred ninety-one thousand, eight hundred eighty-six".