2489157780 has 24 divisors (see below), whose sum is σ = 6969641952. Its totient is φ = 663775392.

The previous prime is 2489157763. The next prime is 2489157787. The reversal of 2489157780 is 877519842.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489157787) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20742922 + ... + 20743041.

It is an arithmetic number, because the mean of its divisors is an integer number (290401748).

Almost surely, 2^2489157780 is an apocalyptic number.

2489157780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2489157780 is an abundant number, since it is smaller than the sum of its proper divisors (4480484172).

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

2489157780 is a wasteful number, since it uses less digits than its factorization.

2489157780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41485975 (or 41485973 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 51.

The square root of 2489157780 is about 49891.4599906637. The cubic root of 2489157780 is about 1355.2439442241.

The spelling of 2489157780 in words is "two billion, four hundred eighty-nine million, one hundred fifty-seven thousand, seven hundred eighty".