2268989 has 4 divisors (see below), whose sum is σ = 2347260. Its totient is φ = 2190720.

The previous prime is 2268979. The next prime is 2268991. The reversal of 2268989 is 9898622.

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 1836025 + 432964 = 1355^2 + 658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2268989 is a prime.

It is a super-2 number, since 2×2268989² = 10296622164242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2268919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39092 + ... + 39149.

It is an arithmetic number, because the mean of its divisors is an integer number (586815).

2^2268989 is an apocalyptic number.

2268989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2268989 is a deficient number, since it is larger than the sum of its proper divisors (78271).

2268989 is an equidigital number, since it uses as much as digits as its factorization.

2268989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78270.

The product of its digits is 124416, while the sum is 44.

The square root of 2268989 is about 1506.3163678325. The cubic root of 2268989 is about 131.4046690599.

The spelling of 2268989 in words is "two million, two hundred sixty-eight thousand, nine hundred eighty-nine".