28502903856 has 80 divisors (see below), whose sum is σ = 84290668544. Its totient is φ = 8130212352.

The previous prime is 28502903843. The next prime is 28502903873. The reversal of 28502903856 is 65830920582.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

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, 134076 + ... + 273828.

Almost surely, 2^28502903856 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 28502903856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42145334272).

28502903856 is an abundant number, since it is smaller than the sum of its proper divisors (55787764688).

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

28502903856 is a wasteful number, since it uses less digits than its factorization.

28502903856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140378 (or 140372 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 28502903856 in words is "twenty-eight billion, five hundred two million, nine hundred three thousand, eight hundred fifty-six".