2489779842 has 16 divisors (see below), whose sum is σ = 5432247072. Its totient is φ = 754478720.

The previous prime is 2489779841. The next prime is 2489779867.

2489779842 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (2489779841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18861903 + ... + 18862034.

It is an arithmetic number, because the mean of its divisors is an integer number (339515442).

Almost surely, 2^2489779842 is an apocalyptic number.

2489779842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2489779842 is an abundant number, since it is smaller than the sum of its proper divisors (2942467230).

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

2489779842 is a wasteful number, since it uses less digits than its factorization.

2489779842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37723953.

The product of its digits is 16257024, while the sum is 60.

The square root of 2489779842 is about 49897.6937543210. The cubic root of 2489779842 is about 1355.3568305381.

The spelling of 2489779842 in words is "two billion, four hundred eighty-nine million, seven hundred seventy-nine thousand, eight hundred forty-two".