28681603536 has 40 divisors (see below), whose sum is σ = 74130210720. Its totient is φ = 9555880576.

The previous prime is 28681603513. The next prime is 28681603541. The reversal of 28681603536 is 63530618682.

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

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 45090 + ... + 243713.

It is an arithmetic number, because the mean of its divisors is an integer number (1853255268).

Almost surely, 2^28681603536 is an apocalyptic number.

It is an amenable number.

28681603536 is an abundant number, since it is smaller than the sum of its proper divisors (45448607184).

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

28681603536 is a wasteful number, since it uses less digits than its factorization.

28681603536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290883 (or 290877 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 28681603536 in words is "twenty-eight billion, six hundred eighty-one million, six hundred three thousand, five hundred thirty-six".