2439780289 has 4 divisors (see below), whose sum is σ = 2440256560. Its totient is φ = 2439304020.

The previous prime is 2439780283. The next prime is 2439780349. The reversal of 2439780289 is 9820879342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2439780289 - 2²³ = 2431391681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2439780283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230367 + ... + 240724.

It is an arithmetic number, because the mean of its divisors is an integer number (610064140).

Almost surely, 2^2439780289 is an apocalyptic number.

It is an amenable number.

2439780289 is a deficient number, since it is larger than the sum of its proper divisors (476271).

2439780289 is an equidigital number, since it uses as much as digits as its factorization.

2439780289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476270.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 2439780289 is about 49394.1321312562. The cubic root of 2439780289 is about 1346.2226899325. Note that the first 3 decimals are identical.

The spelling of 2439780289 in words is "two billion, four hundred thirty-nine million, seven hundred eighty thousand, two hundred eighty-nine".