2797778880 has 840 divisors, whose sum is σ = 11803331232. Its totient is φ = 624070656.

The previous prime is 2797778833. The next prime is 2797778909. The reversal of 2797778880 is 888777972.

It is a super-2 number, since 2×2797778880² = 15655133322748108800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 121642549 + ... + 121642571.

Almost surely, 2^2797778880 is an apocalyptic number.

2797778880 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 2797778880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5901665616).

2797778880 is an abundant number, since it is smaller than the sum of its proper divisors (9005552352).

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

2797778880 is a wasteful number, since it uses less digits than its factorization.

2797778880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 22127616, while the sum is 63.

The square root of 2797778880 is about 52894.0344462398. The cubic root of 2797778880 is about 1409.0869598199.

The spelling of 2797778880 in words is "two billion, seven hundred ninety-seven million, seven hundred seventy-eight thousand, eight hundred eighty".