16891284 has 12 divisors (see below), whose sum is σ = 39413024. Its totient is φ = 5630424.

The previous prime is 16891267. The next prime is 16891307. The reversal of 16891284 is 48219861.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 703792 + ... + 703815.

Almost surely, 2^16891284 is an apocalyptic number.

It is an amenable number.

16891284 is an abundant number, since it is smaller than the sum of its proper divisors (22521740).

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

16891284 is a wasteful number, since it uses less digits than its factorization.

16891284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407614 (or 1407612 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 16891284 is about 4109.9007287281. The cubic root of 16891284 is about 256.5788699169.

The spelling of 16891284 in words is "sixteen million, eight hundred ninety-one thousand, two hundred eighty-four".