2489865780 has 48 divisors (see below), whose sum is σ = 7049972160. Its totient is φ = 656502528.

The previous prime is 2489865767. The next prime is 2489865793. The reversal of 2489865780 is 875689842.

It is an interprime number because it is at equal distance from previous prime (2489865767) and next prime (2489865793).

It is a self number, because there is not a number n which added to its sum of digits gives 2489865780.

It is a congruent number.

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, 227794 + ... + 238473.

It is an arithmetic number, because the mean of its divisors is an integer number (146874420).

Almost surely, 2^2489865780 is an apocalyptic number.

2489865780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2489865780 is an abundant number, since it is smaller than the sum of its proper divisors (4560106380).

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

2489865780 is a wasteful number, since it uses less digits than its factorization.

2489865780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466368 (or 466366 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 57.

The square root of 2489865780 is about 49898.5548888943. The cubic root of 2489865780 is about 1355.3724243285.

The spelling of 2489865780 in words is "two billion, four hundred eighty-nine million, eight hundred sixty-five thousand, seven hundred eighty".