2179990800 has 240 divisors, whose sum is σ = 8356548480. Its totient is φ = 536578560.

The previous prime is 2179990739. The next prime is 2179990837. The reversal of 2179990800 is 80999712.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132637 + ... + 148163.

It is an arithmetic number, because the mean of its divisors is an integer number (34818952).

Almost surely, 2^2179990800 is an apocalyptic number.

2179990800 is a gapful number since it is divisible by the number (20) 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 2179990800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4178274240).

2179990800 is an abundant number, since it is smaller than the sum of its proper divisors (6176557680).

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

2179990800 is a wasteful number, since it uses less digits than its factorization.

2179990800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15567 (or 15550 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 2179990800 is about 46690.3715984356. The cubic root of 2179990800 is about 1296.6364329545.

The spelling of 2179990800 in words is "two billion, one hundred seventy-nine million, nine hundred ninety thousand, eight hundred".