16891420 has 48 divisors (see below), whose sum is σ = 43662528. Its totient is φ = 5345280.

The previous prime is 16891411. The next prime is 16891423. The reversal of 16891420 is 2419861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16891423) 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 15 ways as a sum of consecutive naturals, for example, 2821 + ... + 6460.

It is an arithmetic number, because the mean of its divisors is an integer number (909636).

Almost surely, 2^16891420 is an apocalyptic number.

16891420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16891420 is an abundant number, since it is smaller than the sum of its proper divisors (26771108).

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

16891420 is a wasteful number, since it uses less digits than its factorization.

16891420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9310 (or 9308 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 16891420 is about 4109.9172741066. The cubic root of 16891420 is about 256.5795585291.

The spelling of 16891420 in words is "sixteen million, eight hundred ninety-one thousand, four hundred twenty".