40040212 has 12 divisors (see below), whose sum is σ = 70296436. Its totient is φ = 19955520.

The previous prime is 40040197. The next prime is 40040227. The reversal of 40040212 is 21204004.

40040212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40040197) and next prime (40040227).

It can be written as a sum of positive squares in 2 ways, for example, as 1052676 + 38987536 = 1026^2 + 6244^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40040192 and 40040201.

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, 14739 + ... + 17242.

Almost surely, 2^40040212 is an apocalyptic number.

It is an amenable number.

40040212 is a deficient number, since it is larger than the sum of its proper divisors (30256224).

40040212 is a wasteful number, since it uses less digits than its factorization.

40040212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32298 (or 32296 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40040212 is about 6327.7335594982. The cubic root of 40040212 is about 342.1097535414.

Adding to 40040212 its reverse (21204004), we get a palindrome (61244216).

The spelling of 40040212 in words is "forty million, forty thousand, two hundred twelve".