28446538236 has 24 divisors (see below), whose sum is σ = 66820731600. Its totient is φ = 9418540032.

The previous prime is 28446538223. The next prime is 28446538247. The reversal of 28446538236 is 63283564482.

It is a super-2 number, since 2×28446538236² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7953061 + ... + 7956636.

It is an arithmetic number, because the mean of its divisors is an integer number (2784197150).

Almost surely, 2^28446538236 is an apocalyptic number.

It is an amenable number.

28446538236 is an abundant number, since it is smaller than the sum of its proper divisors (38374193364).

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

28446538236 is a wasteful number, since it uses less digits than its factorization.

28446538236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15909853 (or 15909851 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 51.

The spelling of 28446538236 in words is "twenty-eight billion, four hundred forty-six million, five hundred thirty-eight thousand, two hundred thirty-six".