28904338 has 16 divisors (see below), whose sum is σ = 45183744. Its totient is φ = 13852080.

The previous prime is 28904287. The next prime is 28904341. The reversal of 28904338 is 83340982.

It is a junction number, because it is equal to n+sod(n) for n = 28904297 and 28904306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4456 + ... + 8812.

It is an arithmetic number, because the mean of its divisors is an integer number (2823984).

Almost surely, 2^28904338 is an apocalyptic number.

28904338 is a deficient number, since it is larger than the sum of its proper divisors (16279406).

28904338 is a wasteful number, since it uses less digits than its factorization.

28904338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 28904338 is about 5376.2754765730. The cubic root of 28904338 is about 306.8934897735.

The spelling of 28904338 in words is "twenty-eight million, nine hundred four thousand, three hundred thirty-eight".