238222290 has 48 divisors (see below), whose sum is σ = 590842944. Its totient is φ = 61469280.

The previous prime is 238222289. The next prime is 238222291. The reversal of 238222290 is 92222832.

It is an interprime number because it is at equal distance from previous prime (238222289) and next prime (238222291).

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238222291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24699 + ... + 32961.

It is an arithmetic number, because the mean of its divisors is an integer number (12309228).

Almost surely, 2^238222290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238222290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295421472).

238222290 is an abundant number, since it is smaller than the sum of its proper divisors (352620654).

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

238222290 is a wasteful number, since it uses less digits than its factorization.

238222290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8335 (or 8304 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 238222290 is about 15434.4513993857. The cubic root of 238222290 is about 619.9083197771.

The spelling of 238222290 in words is "two hundred thirty-eight million, two hundred twenty-two thousand, two hundred ninety".