28088135992 has 32 divisors (see below), whose sum is σ = 62805772800. Its totient is φ = 11514390624.

The previous prime is 28088135987. The next prime is 28088136017. The reversal of 28088135992 is 29953188082.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10902492 + ... + 10905067.

It is an arithmetic number, because the mean of its divisors is an integer number (1962680400).

Almost surely, 2^28088135992 is an apocalyptic number.

It is an amenable number.

28088135992 is an abundant number, since it is smaller than the sum of its proper divisors (34717636808).

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

28088135992 is a wasteful number, since it uses less digits than its factorization.

28088135992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21807595 (or 21807591 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 28088135992 in words is "twenty-eight billion, eighty-eight million, one hundred thirty-five thousand, nine hundred ninety-two".