28951591104 has 112 divisors (see below), whose sum is σ = 85288160640. Its totient is φ = 9630593280.

The previous prime is 28951591103. The next prime is 28951591121. The reversal of 28951591104 is 40119515982.

28951591104 is a `hidden beast` number, since 2 + 8 + 9 + 51 + 591 + 1 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28951591104.

It is not an unprimeable number, because it can be changed into a prime (28951591103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831387 + ... + 865509.

Almost surely, 2^28951591104 is an apocalyptic number.

28951591104 is a gapful number since it is divisible by the number (24) 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 28951591104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42644080320).

28951591104 is an abundant number, since it is smaller than the sum of its proper divisors (56336569536).

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

28951591104 is a wasteful number, since it uses less digits than its factorization.

28951591104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34635 (or 34619 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The spelling of 28951591104 in words is "twenty-eight billion, nine hundred fifty-one million, five hundred ninety-one thousand, one hundred four".