28022338 has 4 divisors (see below), whose sum is σ = 42033510. Its totient is φ = 14011168.

The previous prime is 28022333. The next prime is 28022339. The reversal of 28022338 is 83322082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23107249 + 4915089 = 4807^2 + 2217^2 .

It is not an unprimeable number, because it can be changed into a prime (28022333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7005583 + ... + 7005586.

Almost surely, 2^28022338 is an apocalyptic number.

28022338 is a deficient number, since it is larger than the sum of its proper divisors (14011172).

28022338 is a wasteful number, since it uses less digits than its factorization.

28022338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14011171.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28022338 is about 5293.6129439165. The cubic root of 28022338 is about 303.7396272997.

The spelling of 28022338 in words is "twenty-eight million, twenty-two thousand, three hundred thirty-eight".