22820238 has 64 divisors (see below), whose sum is σ = 58821120. Its totient is φ = 6422976.

The previous prime is 22820183. The next prime is 22820261. The reversal of 22820238 is 83202822.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 27181 + ... + 28007.

It is an arithmetic number, because the mean of its divisors is an integer number (919080).

Almost surely, 2^22820238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22820238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29410560).

22820238 is an abundant number, since it is smaller than the sum of its proper divisors (36000882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22820238 is a wasteful number, since it uses less digits than its factorization.

22820238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 22820238 is about 4777.0532758176. The cubic root of 22820238 is about 283.6438619252.

The spelling of 22820238 in words is "twenty-two million, eight hundred twenty thousand, two hundred thirty-eight".