28531425608 has 96 divisors (see below), whose sum is σ = 64437834240. Its totient is φ = 11796503040.

The previous prime is 28531425553. The next prime is 28531425613. The reversal of 28531425608 is 80652413582.

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 23 ways as a sum of consecutive naturals, for example, 4091741 + ... + 4098707.

It is an arithmetic number, because the mean of its divisors is an integer number (671227440).

Almost surely, 2^28531425608 is an apocalyptic number.

28531425608 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 28531425608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32218917120).

28531425608 is an abundant number, since it is smaller than the sum of its proper divisors (35906408632).

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

28531425608 is a wasteful number, since it uses less digits than its factorization.

28531425608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355 (or 7344 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 28531425608 in words is "twenty-eight billion, five hundred thirty-one million, four hundred twenty-five thousand, six hundred eight".