28420806424 has 8 divisors (see below), whose sum is σ = 53289012060. Its totient is φ = 14210403208.

The previous prime is 28420806409. The next prime is 28420806433. The reversal of 28420806424 is 42460802482.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1776300394 + ... + 1776300409.

Almost surely, 2^28420806424 is an apocalyptic number.

It is an amenable number.

28420806424 is a deficient number, since it is larger than the sum of its proper divisors (24868205636).

28420806424 is a wasteful number, since it uses less digits than its factorization.

28420806424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552600809 (or 3552600805 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 40.

The spelling of 28420806424 in words is "twenty-eight billion, four hundred twenty million, eight hundred six thousand, four hundred twenty-four".