28338735285 has 24 divisors (see below), whose sum is σ = 56137685760. Its totient is φ = 12954850272.

The previous prime is 28338735283. The next prime is 28338735289. The reversal of 28338735285 is 58253783382.

It is a happy number.

28338735285 is a `hidden beast` number, since 2 + 8 + 33 + 87 + 3 + 528 + 5 = 666.

It is not a de Polignac number, because 28338735285 - 2¹ = 28338735283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338735283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44981805 + ... + 44982434.

It is an arithmetic number, because the mean of its divisors is an integer number (2339070240).

Almost surely, 2^28338735285 is an apocalyptic number.

It is an amenable number.

28338735285 is a deficient number, since it is larger than the sum of its proper divisors (27798950475).

28338735285 is a wasteful number, since it uses less digits than its factorization.

28338735285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89964257 (or 89964254 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 28338735285 in words is "twenty-eight billion, three hundred thirty-eight million, seven hundred thirty-five thousand, two hundred eighty-five".