22190238 has 72 divisors (see below), whose sum is σ = 56642040. Its totient is φ = 6259680.

The previous prime is 22190227. The next prime is 22190243. The reversal of 22190238 is 83209122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 122508 + ... + 122688.

It is an arithmetic number, because the mean of its divisors is an integer number (786695).

Almost surely, 2^22190238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22190238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28321020).

22190238 is an abundant number, since it is smaller than the sum of its proper divisors (34451802).

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

22190238 is a wasteful number, since it uses less digits than its factorization.

22190238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 22190238 is about 4710.6515472915. The cubic root of 22190238 is about 281.0092743147.

The spelling of 22190238 in words is "twenty-two million, one hundred ninety thousand, two hundred thirty-eight".