28500434850 has 48 divisors (see below), whose sum is σ = 70763872608. Its totient is φ = 7591213440.

The previous prime is 28500434849. The next prime is 28500434863. The reversal of 28500434850 is 5843400582.

It is a junction number, because it is equal to n+sod(n) for n = 28500434799 and 28500434808.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17697 + ... + 239403.

It is an arithmetic number, because the mean of its divisors is an integer number (1474247346).

Almost surely, 2^28500434850 is an apocalyptic number.

28500434850 is an abundant number, since it is smaller than the sum of its proper divisors (42263437758).

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

28500434850 is a wasteful number, since it uses less digits than its factorization.

28500434850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222579 (or 222574 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

The spelling of 28500434850 in words is "twenty-eight billion, five hundred million, four hundred thirty-four thousand, eight hundred fifty".