2981821080 has 384 divisors, whose sum is σ = 11076756480. Its totient is φ = 628776960.

The previous prime is 2981821079. The next prime is 2981821091. The reversal of 2981821080 is 801281892.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17235874 + ... + 17236046.

It is an arithmetic number, because the mean of its divisors is an integer number (28845720).

Almost surely, 2^2981821080 is an apocalyptic number.

2981821080 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 2981821080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5538378240).

2981821080 is an abundant number, since it is smaller than the sum of its proper divisors (8094935400).

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

2981821080 is a wasteful number, since it uses less digits than its factorization.

2981821080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 2981821080 is about 54606.0535105770. The cubic root of 2981821080 is about 1439.3304950998.

The spelling of 2981821080 in words is "two billion, nine hundred eighty-one million, eight hundred twenty-one thousand, eighty".