16891212 has 36 divisors (see below), whose sum is σ = 42682920. Its totient is φ = 5196672.

The previous prime is 16891211. The next prime is 16891213. The reversal of 16891212 is 21219861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16891211) and next prime (16891213).

It is a self number, because there is not a number n which added to its sum of digits gives 16891212.

It is not an unprimeable number, because it can be changed into a prime (16891211) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2137 + ... + 6192.

Almost surely, 2^16891212 is an apocalyptic number.

16891212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16891212 is an abundant number, since it is smaller than the sum of its proper divisors (25791708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16891212 is a wasteful number, since it uses less digits than its factorization.

16891212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8362 (or 8347 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 16891212 is about 4109.8919693831. The cubic root of 16891212 is about 256.5785053560.

The spelling of 16891212 in words is "sixteen million, eight hundred ninety-one thousand, two hundred twelve".