22284487 has 4 divisors (see below), whose sum is σ = 22304016. Its totient is φ = 22264960.

The previous prime is 22284469. The next prime is 22284497. The reversal of 22284487 is 78448222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22284487 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 (22284407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7939 + ... + 10372.

It is an arithmetic number, because the mean of its divisors is an integer number (5576004).

Almost surely, 2^22284487 is an apocalyptic number.

22284487 is a deficient number, since it is larger than the sum of its proper divisors (19529).

22284487 is a wasteful number, since it uses less digits than its factorization.

22284487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19528.

The product of its digits is 57344, while the sum is 37.

The square root of 22284487 is about 4720.6447652837. The cubic root of 22284487 is about 281.4065576427.

The spelling of 22284487 in words is "twenty-two million, two hundred eighty-four thousand, four hundred eighty-seven".