2019816 has 48 divisors (see below), whose sum is σ = 5678400. Its totient is φ = 672624.

The previous prime is 2019811. The next prime is 2019817. The reversal of 2019816 is 6189102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2019816.

It is not an unprimeable number, because it can be changed into a prime (2019811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425 + ... + 2463.

It is an arithmetic number, because the mean of its divisors is an integer number (118300).

2^2019816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2019816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2839200).

2019816 is an abundant number, since it is smaller than the sum of its proper divisors (3658584).

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

2019816 is a wasteful number, since it uses less digits than its factorization.

2019816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2019816 is about 1421.2023079069. The cubic root of 2019816 is about 126.4068481575.

The spelling of 2019816 in words is "two million, nineteen thousand, eight hundred sixteen".