2781801120 has 384 divisors, whose sum is σ = 10952589312. Its totient is φ = 578764800.

The previous prime is 2781801119. The next prime is 2781801161. The reversal of 2781801120 is 211081872.

It is a happy number.

2781801120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1769935 + ... + 1771505.

It is an arithmetic number, because the mean of its divisors is an integer number (28522368).

Almost surely, 2^2781801120 is an apocalyptic number.

2781801120 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 2781801120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5476294656).

2781801120 is an abundant number, since it is smaller than the sum of its proper divisors (8170788192).

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

2781801120 is a wasteful number, since it uses less digits than its factorization.

2781801120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 2781801120 is about 52742.7826342145. The cubic root of 2781801120 is about 1406.3994650813.

Adding to 2781801120 its reverse (211081872), we get a palindrome (2992882992).

The spelling of 2781801120 in words is "two billion, seven hundred eighty-one million, eight hundred one thousand, one hundred twenty".