2778243000 has 128 divisors (see below), whose sum is σ = 9335027520. Its totient is φ = 683865600.

The previous prime is 2778242989. The next prime is 2778243011. The reversal of 2778243000 is 3428772.

It is an interprime number because it is at equal distance from previous prime (2778242989) and next prime (2778243011).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3382 + ... + 74618.

Almost surely, 2^2778243000 is an apocalyptic number.

2778243000 is a gapful number since it is divisible by the number (20) 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 2778243000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4667513760).

2778243000 is an abundant number, since it is smaller than the sum of its proper divisors (6556784520).

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

2778243000 is a wasteful number, since it uses less digits than its factorization.

2778243000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71274 (or 71260 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 2778243000 is about 52709.0409702169. The cubic root of 2778243000 is about 1405.7995811793.

The spelling of 2778243000 in words is "two billion, seven hundred seventy-eight million, two hundred forty-three thousand".