28109336 has 8 divisors (see below), whose sum is σ = 52705020. Its totient is φ = 14054664.

The previous prime is 28109327. The next prime is 28109357. The reversal of 28109336 is 63390182.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1756826 + ... + 1756841.

Almost surely, 2^28109336 is an apocalyptic number.

It is an amenable number.

28109336 is a deficient number, since it is larger than the sum of its proper divisors (24595684).

28109336 is a wasteful number, since it uses less digits than its factorization.

28109336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513673 (or 3513669 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 28109336 is about 5301.8238371338. The cubic root of 28109336 is about 304.0536320427.

The spelling of 28109336 in words is "twenty-eight million, one hundred nine thousand, three hundred thirty-six".