40405912 has 16 divisors (see below), whose sum is σ = 77004000. Its totient is φ = 19871520.

The previous prime is 40405909. The next prime is 40405931. The reversal of 40405912 is 21950404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40912 + ... + 41887.

It is an arithmetic number, because the mean of its divisors is an integer number (4812750).

Almost surely, 2^40405912 is an apocalyptic number.

It is an amenable number.

40405912 is a deficient number, since it is larger than the sum of its proper divisors (36598088).

40405912 is a wasteful number, since it uses less digits than its factorization.

40405912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82866 (or 82862 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40405912 is about 6356.5644809126. The cubic root of 40405912 is about 343.1481310724.

The spelling of 40405912 in words is "forty million, four hundred five thousand, nine hundred twelve".