28357487500 has 72 divisors (see below), whose sum is σ = 65677233888. Its totient is φ = 10675680000.

The previous prime is 28357487419. The next prime is 28357487527. The reversal of 28357487500 is 578475382.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145777 + ... + 279223.

It is an arithmetic number, because the mean of its divisors is an integer number (912183804).

Almost surely, 2^28357487500 is an apocalyptic number.

28357487500 is a gapful number since it is divisible by the number (20) 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 28357487500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32838616944).

28357487500 is an abundant number, since it is smaller than the sum of its proper divisors (37319746388).

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

28357487500 is a wasteful number, since it uses less digits than its factorization.

28357487500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133493 (or 133471 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 28357487500 in words is "twenty-eight billion, three hundred fifty-seven million, four hundred eighty-seven thousand, five hundred".