28001615088 has 40 divisors (see below), whose sum is σ = 72417372928. Its totient is φ = 9323566272.

The previous prime is 28001615071. The next prime is 28001615111. The reversal of 28001615088 is 88051610082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278056 + ... + 365127.

Almost surely, 2^28001615088 is an apocalyptic number.

It is an amenable number.

28001615088 is an abundant number, since it is smaller than the sum of its proper divisors (44415757840).

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

28001615088 is a wasteful number, since it uses less digits than its factorization.

28001615088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644101 (or 644095 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 28001615088 in words is "twenty-eight billion, one million, six hundred fifteen thousand, eighty-eight".