2257778 has 4 divisors (see below), whose sum is σ = 3386670. Its totient is φ = 1128888.

The previous prime is 2257771. The next prime is 2257781. The reversal of 2257778 is 8777522.

2257778 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., 1530169 + 727609 = 1237^2 + 853^2 .

It is a super-2 number, since 2×2257778² = 10195122994568, which contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2257771) 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, 564443 + ... + 564446.

2^2257778 is an apocalyptic number.

2257778 is a deficient number, since it is larger than the sum of its proper divisors (1128892).

2257778 is a wasteful number, since it uses less digits than its factorization.

2257778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128891.

The product of its digits is 54880, while the sum is 38.

The square root of 2257778 is about 1502.5904298910. The cubic root of 2257778 is about 131.1878895846.

The spelling of 2257778 in words is "two million, two hundred fifty-seven thousand, seven hundred seventy-eight".