40991912 has 16 divisors (see below), whose sum is σ = 82772340. Its totient is φ = 18919296.

The previous prime is 40991903. The next prime is 40991927. The reversal of 40991912 is 21919904.

40991912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40119556 + 872356 = 6334^2 + 934^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

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, 196973 + ... + 197180.

Almost surely, 2^40991912 is an apocalyptic number.

It is an amenable number.

40991912 is an abundant number, since it is smaller than the sum of its proper divisors (41780428).

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

40991912 is a wasteful number, since it uses less digits than its factorization.

40991912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394172 (or 394168 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 40991912 is about 6402.4926395897. The cubic root of 40991912 is about 344.7990484162.

The spelling of 40991912 in words is "forty million, nine hundred ninety-one thousand, nine hundred twelve".