28117570548 has 24 divisors (see below), whose sum is σ = 65615804352. Its totient is φ = 9371360704.

The previous prime is 28117570483. The next prime is 28117570561. The reversal of 28117570548 is 84507571182.

It is a junction number, because it is equal to n+sod(n) for n = 28117570497 and 28117570506.

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, 41640 + ... + 240767.

It is an arithmetic number, because the mean of its divisors is an integer number (2733991848).

Almost surely, 2^28117570548 is an apocalyptic number.

It is an amenable number.

28117570548 is an abundant number, since it is smaller than the sum of its proper divisors (37498233804).

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

28117570548 is a wasteful number, since it uses less digits than its factorization.

28117570548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290711 (or 290709 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 48.

The spelling of 28117570548 in words is "twenty-eight billion, one hundred seventeen million, five hundred seventy thousand, five hundred forty-eight".