28617840333828 has 30 divisors (see below), whose sum is σ = 74812687540206. Its totient is φ = 9539280111168.

The previous prime is 28617840333791. The next prime is 28617840333847. The reversal of 28617840333828 is 82833304871682.

28617840333828 is a `hidden beast` number, since 2 + 8 + 6 + 178 + 403 + 3 + 38 + 28 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21234327557184 + 7383512776644 = 4608072^2 + 2717262^2 .

It is a super-2 number, since 2×28617840333828² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 44163333525 + ... + 44163334172.

Almost surely, 2^{28617840333828} is an apocalyptic number.

It is an amenable number.

28617840333828 is an abundant number, since it is smaller than the sum of its proper divisors (46194847206378).

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

28617840333828 is a wasteful number, since it uses less digits than its factorization.

28617840333828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88326667713 (or 88326667702 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 63.

The spelling of 28617840333828 in words is "twenty-eight trillion, six hundred seventeen billion, eight hundred forty million, three hundred thirty-three thousand, eight hundred twenty-eight".