2111984280 has 480 divisors, whose sum is σ = 8446893840. Its totient is φ = 471744000.

The previous prime is 2111984263. The next prime is 2111984291. The reversal of 2111984280 is 824891112.

It is a happy number.

2111984280 is a `hidden beast` number, since 211 + 19 + 8 + 428 + 0 = 666.

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 119 ways as a sum of consecutive naturals, for example, 8414155 + ... + 8414405.

Almost surely, 2^2111984280 is an apocalyptic number.

2111984280 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 2111984280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4223446920).

2111984280 is an abundant number, since it is smaller than the sum of its proper divisors (6334909560).

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

2111984280 is a wasteful number, since it uses less digits than its factorization.

2111984280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 2111984280 is about 45956.3301406890. The cubic root of 2111984280 is about 1283.0105487556.

The spelling of 2111984280 in words is "two billion, one hundred eleven million, nine hundred eighty-four thousand, two hundred eighty".