22906290 has 64 divisors (see below), whose sum is σ = 61471872. Its totient is φ = 5414400.

The previous prime is 22906283. The next prime is 22906291. The reversal of 22906290 is 9260922.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (22906291) 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 31 ways as a sum of consecutive naturals, for example, 12684 + ... + 14376.

It is an arithmetic number, because the mean of its divisors is an integer number (960498).

Almost surely, 2^22906290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22906290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30735936).

22906290 is an abundant number, since it is smaller than the sum of its proper divisors (38565582).

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

22906290 is a wasteful number, since it uses less digits than its factorization.

22906290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 22906290 is about 4786.0516085809. The cubic root of 22906290 is about 283.9999421411. Note that the first 4 decimals are identical.

The spelling of 22906290 in words is "twenty-two million, nine hundred six thousand, two hundred ninety".