28104436 has 12 divisors (see below), whose sum is σ = 51321312. Its totient is φ = 13441208.

The previous prime is 28104389. The next prime is 28104437. The reversal of 28104436 is 63440182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28104437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152650 + ... + 152833.

It is an arithmetic number, because the mean of its divisors is an integer number (4276776).

Almost surely, 2^28104436 is an apocalyptic number.

It is an amenable number.

28104436 is a deficient number, since it is larger than the sum of its proper divisors (23216876).

28104436 is a wasteful number, since it uses less digits than its factorization.

28104436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305510 (or 305508 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28104436 is about 5301.3617118623. The cubic root of 28104436 is about 304.0359635431.

The spelling of 28104436 in words is "twenty-eight million, one hundred four thousand, four hundred thirty-six".