2288945 has 4 divisors (see below), whose sum is σ = 2746740. Its totient is φ = 1831152.

The previous prime is 2288939. The next prime is 2288953. The reversal of 2288945 is 5498822.

2288945 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 2 ways, for example, as 461041 + 1827904 = 679^2 + 1352^2 .

It is a cyclic number.

It is not a de Polignac number, because 2288945 - 2⁴ = 2288929 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2288899 and 2288908.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 228890 + ... + 228899.

It is an arithmetic number, because the mean of its divisors is an integer number (686685).

2^2288945 is an apocalyptic number.

It is an amenable number.

2288945 is a deficient number, since it is larger than the sum of its proper divisors (457795).

2288945 is an equidigital number, since it uses as much as digits as its factorization.

2288945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457794.

The product of its digits is 46080, while the sum is 38.

The square root of 2288945 is about 1512.9259730734. The cubic root of 2288945 is about 131.7887844941.

It can be divided in two parts, 2288 and 945, that multiplied together give a triangular number (2162160 = T₂₀₇₉).

The spelling of 2288945 in words is "two million, two hundred eighty-eight thousand, nine hundred forty-five".