2244778 has 4 divisors (see below), whose sum is σ = 3367170. Its totient is φ = 1122388.

The previous prime is 2244769. The next prime is 2244779. The reversal of 2244778 is 8774422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8774422 = 2 ⋅4387211.

It can be written as a sum of positive squares in only one way, i.e., 1238769 + 1006009 = 1113^2 + 1003^2 .

It is a d-powerful number, because it can be written as 2¹⁷ + 2²¹ + 4³ + 4⁷ + 7² + 7² + 8 .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2244779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561193 + ... + 561196.

2^2244778 is an apocalyptic number.

2244778 is a deficient number, since it is larger than the sum of its proper divisors (1122392).

2244778 is a wasteful number, since it uses less digits than its factorization.

2244778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122391.

The product of its digits is 25088, while the sum is 34.

The square root of 2244778 is about 1498.2583221861. The cubic root of 2244778 is about 130.9356170234.

The spelling of 2244778 in words is "two million, two hundred forty-four thousand, seven hundred seventy-eight".