28108511004 has 48 divisors (see below), whose sum is σ = 78901088000. Its totient is φ = 7608318336.

The previous prime is 28108511003. The next prime is 28108511017. The reversal of 28108511004 is 40011580182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28108511003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8804329 + ... + 8807520.

Almost surely, 2^28108511004 is an apocalyptic number.

It is an amenable number.

28108511004 is an abundant number, since it is smaller than the sum of its proper divisors (50792576996).

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

28108511004 is a wasteful number, since it uses less digits than its factorization.

28108511004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17611882 (or 17611880 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The spelling of 28108511004 in words is "twenty-eight billion, one hundred eight million, five hundred eleven thousand, four".