28281029916 has 12 divisors (see below), whose sum is σ = 65989069832. Its totient is φ = 9427009968.

The previous prime is 28281029893. The next prime is 28281029923. The reversal of 28281029916 is 61992018282.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 1178376235 + ... + 1178376258.

Almost surely, 2^28281029916 is an apocalyptic number.

It is an amenable number.

28281029916 is an abundant number, since it is smaller than the sum of its proper divisors (37708039916).

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

28281029916 is a wasteful number, since it uses less digits than its factorization.

28281029916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356752500 (or 2356752498 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 28281029916 in words is "twenty-eight billion, two hundred eighty-one million, twenty-nine thousand, nine hundred sixteen".