2778841998 has 64 divisors (see below), whose sum is σ = 6882624000. Its totient is φ = 825904512.

The previous prime is 2778841997. The next prime is 2778841999. The reversal of 2778841998 is 8991488772.

It is an interprime number because it is at equal distance from previous prime (2778841997) and next prime (2778841999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778841997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62218 + ... + 97101.

It is an arithmetic number, because the mean of its divisors is an integer number (107541000).

Almost surely, 2^2778841998 is an apocalyptic number.

2778841998 is an abundant number, since it is smaller than the sum of its proper divisors (4103782002).

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

2778841998 is a wasteful number, since it uses less digits than its factorization.

2778841998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159366 (or 159360 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 63.

The square root of 2778841998 is about 52714.7227821602. The cubic root of 2778841998 is about 1405.9006055350.

The spelling of 2778841998 in words is "two billion, seven hundred seventy-eight million, eight hundred forty-one thousand, nine hundred ninety-eight".