28051804 has 24 divisors (see below), whose sum is σ = 54054000. Its totient is φ = 12631680.

The previous prime is 28051799. The next prime is 28051823. The reversal of 28051804 is 40815082.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1872 + ... + 7720.

It is an arithmetic number, because the mean of its divisors is an integer number (2252250).

Almost surely, 2^28051804 is an apocalyptic number.

It is an amenable number.

28051804 is a deficient number, since it is larger than the sum of its proper divisors (26002196).

28051804 is a wasteful number, since it uses less digits than its factorization.

28051804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5973 (or 5971 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 28051804 is about 5296.3953779906. The cubic root of 28051804 is about 303.8460525934.

Adding to 28051804 its reverse (40815082), we get a palindrome (68866886).

The spelling of 28051804 in words is "twenty-eight million, fifty-one thousand, eight hundred four".