28689480028 has 12 divisors (see below), whose sum is σ = 54770825592. Its totient is φ = 13040672720.

The previous prime is 28689480019. The next prime is 28689480049. The reversal of 28689480028 is 82008498682.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326016775 + ... + 326016862.

It is an arithmetic number, because the mean of its divisors is an integer number (4564235466).

Almost surely, 2^28689480028 is an apocalyptic number.

It is an amenable number.

28689480028 is a deficient number, since it is larger than the sum of its proper divisors (26081345564).

28689480028 is a wasteful number, since it uses less digits than its factorization.

28689480028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652033652 (or 652033650 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 55.

The spelling of 28689480028 in words is "twenty-eight billion, six hundred eighty-nine million, four hundred eighty thousand, twenty-eight".