2778298 has 4 divisors (see below), whose sum is σ = 4167450. Its totient is φ = 1389148.

The previous prime is 2778277. The next prime is 2778299. The reversal of 2778298 is 8928772.

2778298 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2241009 + 537289 = 1497^2 + 733^2 .

It is not an unprimeable number, because it can be changed into a prime (2778299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694573 + ... + 694576.

2^2778298 is an apocalyptic number.

2778298 is a deficient number, since it is larger than the sum of its proper divisors (1389152).

2778298 is a wasteful number, since it uses less digits than its factorization.

2778298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389151.

The product of its digits is 112896, while the sum is 43.

The square root of 2778298 is about 1666.8227260270. The cubic root of 2778298 is about 140.5808857842.

The spelling of 2778298 in words is "two million, seven hundred seventy-eight thousand, two hundred ninety-eight".