28549693512 has 160 divisors (see below), whose sum is σ = 89126373600. Its totient is φ = 8485295616.

The previous prime is 28549693507. The next prime is 28549693537. The reversal of 28549693512 is 21539694582.

28549693512 is a `hidden beast` number, since 2 + 8 + 549 + 6 + 93 + 5 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 141103 + ... + 277505.

It is an arithmetic number, because the mean of its divisors is an integer number (557039835).

Almost surely, 2^28549693512 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 28549693512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44563186800).

28549693512 is an abundant number, since it is smaller than the sum of its proper divisors (60576680088).

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

28549693512 is a wasteful number, since it uses less digits than its factorization.

28549693512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136457 (or 136444 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 28549693512 in words is "twenty-eight billion, five hundred forty-nine million, six hundred ninety-three thousand, five hundred twelve".