22399989 has 8 divisors (see below), whose sum is σ = 30082080. Its totient is φ = 14825616.

The previous prime is 22399987. The next prime is 22399991. The reversal of 22399989 is 98999322.

It is an interprime number because it is at equal distance from previous prime (22399987) and next prime (22399991).

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

It is not a de Polignac number, because 22399989 - 2¹ = 22399987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22399987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26442 + ... + 27275.

It is an arithmetic number, because the mean of its divisors is an integer number (3760260).

Almost surely, 2^22399989 is an apocalyptic number.

It is an amenable number.

22399989 is a deficient number, since it is larger than the sum of its proper divisors (7682091).

22399989 is a wasteful number, since it uses less digits than its factorization.

22399989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53859.

The product of its digits is 629856, while the sum is 51.

The square root of 22399989 is about 4732.8626643924. The cubic root of 22399989 is about 281.8919031396.

The spelling of 22399989 in words is "twenty-two million, three hundred ninety-nine thousand, nine hundred eighty-nine".