22889881 has 4 divisors (see below), whose sum is σ = 26159872. Its totient is φ = 19619892.

The previous prime is 22889861. The next prime is 22889887. The reversal of 22889881 is 18898822.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18898822 = 2 ⋅9449411.

It is a cyclic number.

It is not a de Polignac number, because 22889881 - 2¹⁵ = 22857113 is a prime.

It is a super-2 number, since 2×22889881² = 1047893304388322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22889887) 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, 1634985 + ... + 1634998.

It is an arithmetic number, because the mean of its divisors is an integer number (6539968).

Almost surely, 2^22889881 is an apocalyptic number.

It is an amenable number.

22889881 is a deficient number, since it is larger than the sum of its proper divisors (3269991).

22889881 is an equidigital number, since it uses as much as digits as its factorization.

22889881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269990.

The product of its digits is 147456, while the sum is 46.

The square root of 22889881 is about 4784.3370491637. The cubic root of 22889881 is about 283.9321111615.

It can be divided in two parts, 228 and 89881, that added together give a palindrome (90109).

The spelling of 22889881 in words is "twenty-two million, eight hundred eighty-nine thousand, eight hundred eighty-one".