40656212 has 12 divisors (see below), whose sum is σ = 71203860. Its totient is φ = 20312256.

The previous prime is 40656193. The next prime is 40656223. The reversal of 40656212 is 21265604.

40656212 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 33016516 + 7639696 = 5746^2 + 2764^2 .

It is a zygodrome in base 3.

It is a congruent number.

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, 3278 + ... + 9594.

It is an arithmetic number, because the mean of its divisors is an integer number (5933655).

Almost surely, 2^40656212 is an apocalyptic number.

It is an amenable number.

40656212 is a deficient number, since it is larger than the sum of its proper divisors (30547648).

40656212 is a wasteful number, since it uses less digits than its factorization.

40656212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7930 (or 7928 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 40656212 is about 6376.2223926083. Note that the first 3 decimals coincide. The cubic root of 40656212 is about 343.8552324870.

The spelling of 40656212 in words is "forty million, six hundred fifty-six thousand, two hundred twelve".