2798195778 has 192 divisors, whose sum is σ = 7709644800. Its totient is φ = 715080960.

The previous prime is 2798195753. The next prime is 2798195833. The reversal of 2798195778 is 8775918972.

It is a super-2 number, since 2×2798195778² = 15659799224034050568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4900233 + ... + 4900803.

It is an arithmetic number, because the mean of its divisors is an integer number (40154400).

Almost surely, 2^2798195778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2798195778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3854822400).

2798195778 is an abundant number, since it is smaller than the sum of its proper divisors (4911449022).

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

2798195778 is a wasteful number, since it uses less digits than its factorization.

2798195778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 714 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 63.

The square root of 2798195778 is about 52897.9751786399. The cubic root of 2798195778 is about 1409.1569458558.

The spelling of 2798195778 in words is "two billion, seven hundred ninety-eight million, one hundred ninety-five thousand, seven hundred seventy-eight".