28022938 has 8 divisors (see below), whose sum is σ = 42062580. Its totient is φ = 14002080.

The previous prime is 28022927. The next prime is 28022941. The reversal of 28022938 is 83922082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22439169 + 5583769 = 4737^2 + 2363^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 43 + ... + 7486.

Almost surely, 2^28022938 is an apocalyptic number.

28022938 is a deficient number, since it is larger than the sum of its proper divisors (14039642).

28022938 is a wasteful number, since it uses less digits than its factorization.

28022938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9392.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28022938 is about 5293.6696156825. The cubic root of 28022938 is about 303.7417951235.

The spelling of 28022938 in words is "twenty-eight million, twenty-two thousand, nine hundred thirty-eight".