28651529088 has 1024 divisors, whose sum is σ = 115482931200. Its totient is φ = 6773538816.

The previous prime is 28651529059. The next prime is 28651529099. The reversal of 28651529088 is 88092515682.

It is a happy number.

28651529088 is a `hidden beast` number, since 28 + 6 + 515 + 29 + 0 + 88 = 666.

It is a super-2 number, since 2×28651529088² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 122967820 + ... + 122968052.

It is an arithmetic number, because the mean of its divisors is an integer number (112776300).

Almost surely, 2^28651529088 is an apocalyptic number.

28651529088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28651529088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57741465600).

28651529088 is an abundant number, since it is smaller than the sum of its proper divisors (86831402112).

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

28651529088 is a wasteful number, since it uses less digits than its factorization.

28651529088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The spelling of 28651529088 in words is "twenty-eight billion, six hundred fifty-one million, five hundred twenty-nine thousand, eighty-eight".