40189806 has 24 divisors (see below), whose sum is σ = 87852960. Its totient is φ = 13277376.

The previous prime is 40189777. The next prime is 40189811. The reversal of 40189806 is 60898104.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7846 + ... + 11913.

It is an arithmetic number, because the mean of its divisors is an integer number (3660540).

Almost surely, 2^40189806 is an apocalyptic number.

40189806 is an abundant number, since it is smaller than the sum of its proper divisors (47663154).

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

40189806 is a wasteful number, since it uses less digits than its factorization.

40189806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19880 (or 19877 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 40189806 is about 6339.5430434693. The cubic root of 40189806 is about 342.5352754617.

It can be divided in two parts, 4018 and 9806, that added together give a cube (13824 = 24³).

The spelling of 40189806 in words is "forty million, one hundred eighty-nine thousand, eight hundred six".