2104439778 has 48 divisors (see below), whose sum is σ = 5404002240. Its totient is φ = 601267536.

The previous prime is 2104439767. The next prime is 2104439803. The reversal of 2104439778 is 8779344012.

2104439778 is a `hidden beast` number, since 210 + 44 + 397 + 7 + 8 = 666.

It is a Curzon 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, 305893 + ... + 312696.

It is an arithmetic number, because the mean of its divisors is an integer number (112583380).

Almost surely, 2^2104439778 is an apocalyptic number.

2104439778 is an abundant number, since it is smaller than the sum of its proper divisors (3299562462).

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

2104439778 is an equidigital number, since it uses as much as digits as its factorization.

2104439778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618613 (or 618601 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 2104439778 is about 45874.1733222518. The cubic root of 2104439778 is about 1281.4809880334.

The spelling of 2104439778 in words is "two billion, one hundred four million, four hundred thirty-nine thousand, seven hundred seventy-eight".