28551685338 has 48 divisors (see below), whose sum is σ = 67862901600. Its totient is φ = 8603679840.

The previous prime is 28551685297. The next prime is 28551685343. The reversal of 28551685338 is 83358615582.

It is a happy number.

28551685338 is a `hidden beast` number, since 2 + 8 + 551 + 6 + 8 + 53 + 38 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367353 + ... + 438236.

It is an arithmetic number, because the mean of its divisors is an integer number (1413810450).

Almost surely, 2^28551685338 is an apocalyptic number.

28551685338 is an abundant number, since it is smaller than the sum of its proper divisors (39311216262).

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

28551685338 is a wasteful number, since it uses less digits than its factorization.

28551685338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805787 (or 805784 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The spelling of 28551685338 in words is "twenty-eight billion, five hundred fifty-one million, six hundred eighty-five thousand, three hundred thirty-eight".