22288487 has 4 divisors (see below), whose sum is σ = 24003000. Its totient is φ = 20573976.

The previous prime is 22288451. The next prime is 22288499. The reversal of 22288487 is 78488222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22288487 - 2²² = 18094183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22288447) 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 in 3 ways as a sum of consecutive naturals, for example, 857237 + ... + 857262.

It is an arithmetic number, because the mean of its divisors is an integer number (6000750).

Almost surely, 2^22288487 is an apocalyptic number.

22288487 is a deficient number, since it is larger than the sum of its proper divisors (1714513).

22288487 is a wasteful number, since it uses less digits than its factorization.

22288487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714512.

The product of its digits is 114688, while the sum is 41.

The square root of 22288487 is about 4721.0684172124. The cubic root of 22288487 is about 281.4233938524.

The spelling of 22288487 in words is "twenty-two million, two hundred eighty-eight thousand, four hundred eighty-seven".