22691238 has 8 divisors (see below), whose sum is σ = 45382488. Its totient is φ = 7563744.

The previous prime is 22691237. The next prime is 22691239. The reversal of 22691238 is 83219622.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22691237) and next prime (22691239).

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

22691238 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 22691199 and 22691208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22691231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1890931 + ... + 1890942.

It is an arithmetic number, because the mean of its divisors is an integer number (5672811).

Almost surely, 2^22691238 is an apocalyptic number.

22691238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22691238 is a wasteful number, since it uses less digits than its factorization.

22691238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781878.

The product of its digits is 10368, while the sum is 33.

The square root of 22691238 is about 4763.5320928907. The cubic root of 22691238 is about 283.1083836961.

The spelling of 22691238 in words is "twenty-two million, six hundred ninety-one thousand, two hundred thirty-eight".