2489978784 has 96 divisors (see below), whose sum is σ = 6714731520. Its totient is φ = 807533312.

The previous prime is 2489978779. The next prime is 2489978833. The reversal of 2489978784 is 4878799842.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 806107 + ... + 809189.

It is an arithmetic number, because the mean of its divisors is an integer number (69945120).

Almost surely, 2^2489978784 is an apocalyptic number.

2489978784 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 2489978784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3357365760).

2489978784 is an abundant number, since it is smaller than the sum of its proper divisors (4224752736).

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

2489978784 is a wasteful number, since it uses less digits than its factorization.

2489978784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322 (or 3314 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 66.

The square root of 2489978784 is about 49899.6872134485. The cubic root of 2489978784 is about 1355.3929288057.

The spelling of 2489978784 in words is "two billion, four hundred eighty-nine million, nine hundred seventy-eight thousand, seven hundred eighty-four".