28659545508 has 432 divisors, whose sum is σ = 85200353280. Its totient is φ = 7453987200.

The previous prime is 28659545401. The next prime is 28659545513. The reversal of 28659545508 is 80554595682.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 609777541 + ... + 609777587.

It is an arithmetic number, because the mean of its divisors is an integer number (197223040).

Almost surely, 2^28659545508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28659545508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42600176640).

28659545508 is an abundant number, since it is smaller than the sum of its proper divisors (56540807772).

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

28659545508 is a wasteful number, since it uses less digits than its factorization.

28659545508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 17280000, while the sum is 57.

The spelling of 28659545508 in words is "twenty-eight billion, six hundred fifty-nine million, five hundred forty-five thousand, five hundred eight".