28338236 has 6 divisors (see below), whose sum is σ = 49591920. Its totient is φ = 14169116.

The previous prime is 28338229. The next prime is 28338239. The reversal of 28338236 is 63283382.

It is a junction number, because it is equal to n+sod(n) for n = 28338196 and 28338205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3542276 + ... + 3542283.

It is an arithmetic number, because the mean of its divisors is an integer number (8265320).

Almost surely, 2^28338236 is an apocalyptic number.

It is an amenable number.

28338236 is a deficient number, since it is larger than the sum of its proper divisors (21253684).

28338236 is a wasteful number, since it uses less digits than its factorization.

28338236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7084563 (or 7084561 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 28338236 is about 5323.3669796474. The cubic root of 28338236 is about 304.8767252420.

The spelling of 28338236 in words is "twenty-eight million, three hundred thirty-eight thousand, two hundred thirty-six".