28055004 has 24 divisors (see below), whose sum is σ = 65710848. Its totient is φ = 9316080.

The previous prime is 28055003. The next prime is 28055017. The reversal of 28055004 is 40055082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062 + ... + 7565.

It is an arithmetic number, because the mean of its divisors is an integer number (2737952).

Almost surely, 2^28055004 is an apocalyptic number.

It is an amenable number.

28055004 is an abundant number, since it is smaller than the sum of its proper divisors (37655844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28055004 is a wasteful number, since it uses less digits than its factorization.

28055004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8905 (or 8903 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 28055004 is about 5296.6974616264. The cubic root of 28055004 is about 303.8576058658.

The spelling of 28055004 in words is "twenty-eight million, fifty-five thousand, four".