22487389 has 4 divisors (see below), whose sum is σ = 22511520. Its totient is φ = 22463260.

The previous prime is 22487371. The next prime is 22487417. The reversal of 22487389 is 98378422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22487389 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 (22487359) 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, 10609 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (5627880).

Almost surely, 2^22487389 is an apocalyptic number.

It is an amenable number.

22487389 is a deficient number, since it is larger than the sum of its proper divisors (24131).

22487389 is an equidigital number, since it uses as much as digits as its factorization.

22487389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24130.

The product of its digits is 193536, while the sum is 43.

The square root of 22487389 is about 4742.0869878145. The cubic root of 22487389 is about 282.2580547833.

The spelling of 22487389 in words is "twenty-two million, four hundred eighty-seven thousand, three hundred eighty-nine".