28425020208 has 160 divisors (see below), whose sum is σ = 82290733056. Its totient is φ = 8398101504.

The previous prime is 28425020203. The next prime is 28425020231. The reversal of 28425020208 is 80202052482.

It is not an unprimeable number, because it can be changed into a prime (28425020203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1545241 + ... + 1563527.

Almost surely, 2^28425020208 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 28425020208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41145366528).

28425020208 is an abundant number, since it is smaller than the sum of its proper divisors (53865712848).

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

28425020208 is a wasteful number, since it uses less digits than its factorization.

28425020208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18411 (or 18405 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The spelling of 28425020208 in words is "twenty-eight billion, four hundred twenty-five million, twenty thousand, two hundred eight".