2778198 has 8 divisors (see below), whose sum is σ = 5556408. Its totient is φ = 926064.

The previous prime is 2778197. The next prime is 2778203. The reversal of 2778198 is 8918772.

It is a sphenic number, since it is the product of 3 distinct primes.

2778198 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231511 + ... + 231522.

It is an arithmetic number, because the mean of its divisors is an integer number (694551).

2^2778198 is an apocalyptic number.

2778198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2778198 is a wasteful number, since it uses less digits than its factorization.

2778198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463038.

The product of its digits is 56448, while the sum is 42.

The square root of 2778198 is about 1666.7927285659. The cubic root of 2778198 is about 140.5791991092.

The spelling of 2778198 in words is "two million, seven hundred seventy-eight thousand, one hundred ninety-eight".