16640212 has 24 divisors (see below), whose sum is σ = 31135104. Its totient is φ = 7754112.

The previous prime is 16640207. The next prime is 16640227. The reversal of 16640212 is 21204661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6133 + ... + 8419.

It is an arithmetic number, because the mean of its divisors is an integer number (1297296).

Almost surely, 2^16640212 is an apocalyptic number.

It is an amenable number.

16640212 is a deficient number, since it is larger than the sum of its proper divisors (14494892).

16640212 is a wasteful number, since it uses less digits than its factorization.

16640212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415 (or 2413 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16640212 is about 4079.2415961794. The cubic root of 16640212 is about 255.3012561573.

Adding to 16640212 its reverse (21204661), we get a palindrome (37844873).

The spelling of 16640212 in words is "sixteen million, six hundred forty thousand, two hundred twelve".