2439890784 has 144 divisors (see below), whose sum is σ = 7268238432. Its totient is φ = 774918144.

The previous prime is 2439890737. The next prime is 2439890797. The reversal of 2439890784 is 4870989342.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 2439890784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2231742 + ... + 2232834.

It is an arithmetic number, because the mean of its divisors is an integer number (50473878).

Almost surely, 2^2439890784 is an apocalyptic number.

2439890784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2439890784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3634119216).

2439890784 is an abundant number, since it is smaller than the sum of its proper divisors (4828347648).

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

2439890784 is a wasteful number, since it uses less digits than its factorization.

2439890784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 2439890784 is about 49395.2506218968. The cubic root of 2439890784 is about 1346.2430126136.

The spelling of 2439890784 in words is "two billion, four hundred thirty-nine million, eight hundred ninety thousand, seven hundred eighty-four".