2780784384 has 144 divisors (see below), whose sum is σ = 8956055808. Its totient is φ = 747749376.

The previous prime is 2780784371. The next prime is 2780784397. The reversal of 2780784384 is 4834870872.

2780784384 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2780784371) and next prime (2780784397).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76179 + ... + 106605.

It is an arithmetic number, because the mean of its divisors is an integer number (62194832).

Almost surely, 2^2780784384 is an apocalyptic number.

2780784384 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 2780784384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4478027904).

2780784384 is an abundant number, since it is smaller than the sum of its proper divisors (6175271424).

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

2780784384 is a wasteful number, since it uses less digits than its factorization.

2780784384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30470 (or 30456 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 51.

The square root of 2780784384 is about 52733.1431265006. The cubic root of 2780784384 is about 1406.2280999414.

The spelling of 2780784384 in words is "two billion, seven hundred eighty million, seven hundred eighty-four thousand, three hundred eighty-four".