28108695552 has 288 divisors, whose sum is σ = 88436275200. Its totient is φ = 7914848256.

The previous prime is 28108695547. The next prime is 28108695607. The reversal of 28108695552 is 25559680182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28108695495 and 28108695504.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21976449 + ... + 21977727.

It is an arithmetic number, because the mean of its divisors is an integer number (307070400).

Almost surely, 2^28108695552 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 28108695552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44218137600).

28108695552 is an abundant number, since it is smaller than the sum of its proper divisors (60327579648).

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

28108695552 is a wasteful number, since it uses less digits than its factorization.

28108695552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1364 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 51.

The spelling of 28108695552 in words is "twenty-eight billion, one hundred eight million, six hundred ninety-five thousand, five hundred fifty-two".