28665649152 has 432 divisors, whose sum is σ = 102028497480. Its totient is φ = 7704281088.

The previous prime is 28665649147. The next prime is 28665649183. The reversal of 28665649152 is 25194656682.

28665649152 is a `hidden beast` number, since 2 + 8 + 66 + 564 + 9 + 15 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15352923 + ... + 15354789.

Almost surely, 2^28665649152 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 28665649152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51014248740).

28665649152 is an abundant number, since it is smaller than the sum of its proper divisors (73362848328).

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

28665649152 is a wasteful number, since it uses less digits than its factorization.

28665649152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926 (or 1896 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 28665649152 in words is "twenty-eight billion, six hundred sixty-five million, six hundred forty-nine thousand, one hundred fifty-two".