2811238980 has 144 divisors (see below), whose sum is σ = 8723097600. Its totient is φ = 675924480.

The previous prime is 2811238933. The next prime is 2811238981. The reversal of 2811238980 is 898321182.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2811238981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 920496 + ... + 923544.

Almost surely, 2^2811238980 is an apocalyptic number.

2811238980 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 2811238980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4361548800).

2811238980 is an abundant number, since it is smaller than the sum of its proper divisors (5911858620).

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

2811238980 is a wasteful number, since it uses less digits than its factorization.

2811238980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210 (or 3197 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 2811238980 is about 53021.1182454689. The cubic root of 2811238980 is about 1411.3430490727.

The spelling of 2811238980 in words is "two billion, eight hundred eleven million, two hundred thirty-eight thousand, nine hundred eighty".