4049281920 has 128 divisors (see below), whose sum is σ = 12949748640. Its totient is φ = 1076240384.

The previous prime is 4049281909. The next prime is 4049281933. The reversal of 4049281920 is 291829404.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605314 + ... + 611966.

Almost surely, 2^4049281920 is an apocalyptic number.

4049281920 is a gapful number since it is divisible by the number (40) 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 4049281920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6474874320).

4049281920 is an abundant number, since it is smaller than the sum of its proper divisors (8900466720).

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

4049281920 is a wasteful number, since it uses less digits than its factorization.

4049281920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992 (or 6980 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 4049281920 is about 63633.9682873856. The cubic root of 4049281920 is about 1593.8936415556.

The spelling of 4049281920 in words is "four billion, forty-nine million, two hundred eighty-one thousand, nine hundred twenty".