2297778 has 16 divisors (see below), whose sum is σ = 5252160. Its totient is φ = 656496.

The previous prime is 2297777. The next prime is 2297797. The reversal of 2297778 is 8777922.

2297778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 54709 = 2297778 / (2 + 2 + 9 + 7 + 7 + 7 + 8).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2297777) 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 in 7 ways as a sum of consecutive naturals, for example, 27313 + ... + 27396.

It is an arithmetic number, because the mean of its divisors is an integer number (328260).

2^2297778 is an apocalyptic number.

2297778 is an abundant number, since it is smaller than the sum of its proper divisors (2954382).

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

2297778 is a wasteful number, since it uses less digits than its factorization.

2297778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54721.

The product of its digits is 98784, while the sum is 42.

The square root of 2297778 is about 1515.8423400869. The cubic root of 2297778 is about 131.9580904602.

The spelling of 2297778 in words is "two million, two hundred ninety-seven thousand, seven hundred seventy-eight".