28357338 has 16 divisors (see below), whose sum is σ = 56799936. Its totient is φ = 9438240.

The previous prime is 28357333. The next prime is 28357369. The reversal of 28357338 is 83375382.

It is a junction number, because it is equal to n+sod(n) for n = 28357296 and 28357305.

It is not an unprimeable number, because it can be changed into a prime (28357333) 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, 1278 + ... + 7638.

It is an arithmetic number, because the mean of its divisors is an integer number (3549996).

Almost surely, 2^28357338 is an apocalyptic number.

28357338 is an abundant number, since it is smaller than the sum of its proper divisors (28442598).

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

28357338 is a wasteful number, since it uses less digits than its factorization.

28357338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7109.

The product of its digits is 120960, while the sum is 39.

The square root of 28357338 is about 5325.1608426413. The cubic root of 28357338 is about 304.9452127696.

The spelling of 28357338 in words is "twenty-eight million, three hundred fifty-seven thousand, three hundred thirty-eight".