2489865846 has 36 divisors (see below), whose sum is σ = 5395697172. Its totient is φ = 765623664.

The previous prime is 2489865839. The next prime is 2489865857. The reversal of 2489865846 is 6485689842.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2489865846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1588155 + ... + 1589721.

It is an arithmetic number, because the mean of its divisors is an integer number (149880477).

Almost surely, 2^2489865846 is an apocalyptic number.

2489865846 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2489865846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697848586).

2489865846 is an abundant number, since it is smaller than the sum of its proper divisors (2905831326).

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

2489865846 is an equidigital number, since it uses as much as digits as its factorization.

2489865846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165 (or 1585 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 60.

The square root of 2489865846 is about 49898.5555502361. Note that the first 5 decimals coincide. The cubic root of 2489865846 is about 1355.3724363043.

The spelling of 2489865846 in words is "two billion, four hundred eighty-nine million, eight hundred sixty-five thousand, eight hundred forty-six".