28886438 has 16 divisors (see below), whose sum is σ = 49593600. Its totient is φ = 12361416.

The previous prime is 28886437. The next prime is 28886449. The reversal of 28886438 is 83468882.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28886392 and 28886401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28886437) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12713 + ... + 14811.

It is an arithmetic number, because the mean of its divisors is an integer number (3099600).

Almost surely, 2^28886438 is an apocalyptic number.

28886438 is a deficient number, since it is larger than the sum of its proper divisors (20707162).

28886438 is a wasteful number, since it uses less digits than its factorization.

28886438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091.

The product of its digits is 589824, while the sum is 47.

The square root of 28886438 is about 5374.6104975151. The cubic root of 28886438 is about 306.8301252611.

The spelling of 28886438 in words is "twenty-eight million, eight hundred eighty-six thousand, four hundred thirty-eight".