28437309128 has 12 divisors (see below), whose sum is σ = 53320848945. Its totient is φ = 14218416080.

The previous prime is 28437309107. The next prime is 28437309161. The reversal of 28437309128 is 82190373482.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 24662189764 + 3775119364 = 157042^2 + 61442^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119242.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 447158 + ... + 506778.

Almost surely, 2^28437309128 is an apocalyptic number.

It is an amenable number.

28437309128 is a deficient number, since it is larger than the sum of its proper divisors (24883539817).

28437309128 is an frugal number, since it uses more digits than its factorization.

28437309128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119248 (or 59623 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 28437309128 in words is "twenty-eight billion, four hundred thirty-seven million, three hundred nine thousand, one hundred twenty-eight".