28081658332 has 48 divisors (see below), whose sum is σ = 61717969600. Its totient is φ = 11109220416.

The previous prime is 28081658281. The next prime is 28081658347. The reversal of 28081658332 is 23385618082.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 769383 + ... + 805054.

Almost surely, 2^28081658332 is an apocalyptic number.

It is an amenable number.

28081658332 is an abundant number, since it is smaller than the sum of its proper divisors (33636311268).

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

28081658332 is a wasteful number, since it uses less digits than its factorization.

28081658332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574475 (or 1574459 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 28081658332 in words is "twenty-eight billion, eighty-one million, six hundred fifty-eight thousand, three hundred thirty-two".