2149238784 has 432 divisors, whose sum is σ = 7450606800. Its totient is φ = 548782080.

The previous prime is 2149238779. The next prime is 2149238801. The reversal of 2149238784 is 4878329412.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 36427747 + ... + 36427805.

It is an arithmetic number, because the mean of its divisors is an integer number (17246775).

Almost surely, 2^2149238784 is an apocalyptic number.

2149238784 is a gapful number since it is divisible by the number (24) 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 2149238784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3725303400).

2149238784 is an abundant number, since it is smaller than the sum of its proper divisors (5301368016).

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

2149238784 is a wasteful number, since it uses less digits than its factorization.

2149238784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 82 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 2149238784 is about 46359.8833475668. The cubic root of 2149238784 is about 1290.5105412620.

The spelling of 2149238784 in words is "two billion, one hundred forty-nine million, two hundred thirty-eight thousand, seven hundred eighty-four".