2798778 has 32 divisors (see below), whose sum is σ = 6189696. Its totient is φ = 839168.

The previous prime is 2798777. The next prime is 2798821. The reversal of 2798778 is 8778972.

It is not an unprimeable number, because it can be changed into a prime (2798777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1750 + ... + 2942.

It is an arithmetic number, because the mean of its divisors is an integer number (193428).

2^2798778 is an apocalyptic number.

2798778 is an abundant number, since it is smaller than the sum of its proper divisors (3390918).

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

2798778 is a wasteful number, since it uses less digits than its factorization.

2798778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its digits is 395136, while the sum is 48.

The square root of 2798778 is about 1672.9548708797. The cubic root of 2798778 is about 140.9254673742.

The spelling of 2798778 in words is "two million, seven hundred ninety-eight thousand, seven hundred seventy-eight".