1819800216 has 128 divisors (see below), whose sum is σ = 5464166400. Its totient is φ = 557850240.

The previous prime is 1819800167. The next prime is 1819800239. The reversal of 1819800216 is 6120089181.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 861001 + ... + 863111.

It is an arithmetic number, because the mean of its divisors is an integer number (42688800).

Almost surely, 2^1819800216 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 1819800216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2732083200).

1819800216 is an abundant number, since it is smaller than the sum of its proper divisors (3644366184).

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

1819800216 is a wasteful number, since it uses less digits than its factorization.

1819800216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446 (or 2436 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1819800216 is about 42659.1164465463. The cubic root of 1819800216 is about 1220.8844737331.

Adding to 1819800216 its reverse (6120089181), we get a palindrome (7939889397).

The spelling of 1819800216 in words is "one billion, eight hundred nineteen million, eight hundred thousand, two hundred sixteen".