28805245428 has 12 divisors (see below), whose sum is σ = 67212239360. Its totient is φ = 9601748472.

The previous prime is 28805245409. The next prime is 28805245481. The reversal of 28805245428 is 82454250882.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200218548 + ... + 1200218571.

Almost surely, 2^28805245428 is an apocalyptic number.

It is an amenable number.

28805245428 is an abundant number, since it is smaller than the sum of its proper divisors (38406993932).

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

28805245428 is a wasteful number, since it uses less digits than its factorization.

28805245428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400437126 (or 2400437124 counting only the distinct ones).

The product of its (nonzero) digits is 1638400, while the sum is 48.

The spelling of 28805245428 in words is "twenty-eight billion, eight hundred five million, two hundred forty-five thousand, four hundred twenty-eight".