40491212 has 18 divisors (see below), whose sum is σ = 75275172. Its totient is φ = 19054144.

The previous prime is 40491193. The next prime is 40491233. The reversal of 40491212 is 21219404.

40491212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 5 ways as a sum of consecutive naturals, for example, 16358 + ... + 18669.

It is an arithmetic number, because the mean of its divisors is an integer number (4181954).

Almost surely, 2^40491212 is an apocalyptic number.

It is an amenable number.

40491212 is a deficient number, since it is larger than the sum of its proper divisors (34783960).

40491212 is a wasteful number, since it uses less digits than its factorization.

40491212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35065 (or 35046 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 40491212 is about 6363.2705427319. The cubic root of 40491212 is about 343.3894320834.

The spelling of 40491212 in words is "forty million, four hundred ninety-one thousand, two hundred twelve".