16089820 has 48 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 5889024.

The previous prime is 16089791. The next prime is 16089833. The reversal of 16089820 is 2898061.

It is a Harshad number since it is a multiple of its sum of digits (34).

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 15 ways as a sum of consecutive naturals, for example, 11941 + ... + 13219.

It is an arithmetic number, because the mean of its divisors is an integer number (766080).

Almost surely, 2^16089820 is an apocalyptic number.

16089820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16089820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18385920).

16089820 is an abundant number, since it is smaller than the sum of its proper divisors (20682020).

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

16089820 is a wasteful number, since it uses less digits than its factorization.

16089820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 16089820 is about 4011.2117869791. The cubic root of 16089820 is about 252.4548558314.

The spelling of 16089820 in words is "sixteen million, eighty-nine thousand, eight hundred twenty".