2288987 has 4 divisors (see below), whose sum is σ = 2409480. Its totient is φ = 2168496.

The previous prime is 2288953. The next prime is 2289013. The reversal of 2288987 is 7898822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7898822 = 2 ⋅3949411.

It is a cyclic number.

It is not a de Polignac number, because 2288987 - 2⁸ = 2288731 is a prime.

It is a super-2 number, since 2×2288987² = 10478922972338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2288927) 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, 60218 + ... + 60255.

It is an arithmetic number, because the mean of its divisors is an integer number (602370).

2^2288987 is an apocalyptic number.

2288987 is a deficient number, since it is larger than the sum of its proper divisors (120493).

2288987 is a wasteful number, since it uses less digits than its factorization.

2288987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120492.

The product of its digits is 129024, while the sum is 44.

The square root of 2288987 is about 1512.9398533980. The cubic root of 2288987 is about 131.7895905561.

The spelling of 2288987 in words is "two million, two hundred eighty-eight thousand, nine hundred eighty-seven".