2778385800 has 48 divisors (see below), whose sum is σ = 8612997840. Its totient is φ = 740902720.

The previous prime is 2778385721. The next prime is 2778385811. The reversal of 2778385800 is 85838772.

It is a self number, because there is not a number n which added to its sum of digits gives 2778385800.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2314722 + ... + 2315921.

It is an arithmetic number, because the mean of its divisors is an integer number (179437455).

Almost surely, 2^2778385800 is an apocalyptic number.

2778385800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2778385800 is an abundant number, since it is smaller than the sum of its proper divisors (5834612040).

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

2778385800 is a wasteful number, since it uses less digits than its factorization.

2778385800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630662 (or 4630653 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

The square root of 2778385800 is about 52710.3955591305. The cubic root of 2778385800 is about 1405.8236665144.

The spelling of 2778385800 in words is "two billion, seven hundred seventy-eight million, three hundred eighty-five thousand, eight hundred".