22821989 has 8 divisors (see below), whose sum is σ = 23091840. Its totient is φ = 22554000.

The previous prime is 22821947. The next prime is 22822013. The reversal of 22821989 is 98912822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22821989 is a prime.

It is a super-2 number, since 2×22821989² = 1041686363832242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22821919) 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 7 ways as a sum of consecutive naturals, for example, 53999 + ... + 54419.

It is an arithmetic number, because the mean of its divisors is an integer number (2886480).

Almost surely, 2^22821989 is an apocalyptic number.

It is an amenable number.

22821989 is a deficient number, since it is larger than the sum of its proper divisors (269851).

22821989 is a wasteful number, since it uses less digits than its factorization.

22821989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its digits is 41472, while the sum is 41.

The square root of 22821989 is about 4777.2365442795. The cubic root of 22821989 is about 283.6511164172.

The spelling of 22821989 in words is "twenty-two million, eight hundred twenty-one thousand, nine hundred eighty-nine".