28165980080 has 80 divisors (see below), whose sum is σ = 76368475200. Its totient is φ = 9656898048.

The previous prime is 28165980077. The next prime is 28165980091. The reversal of 28165980080 is 8008956182.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485789 + ... + 540668.

It is an arithmetic number, because the mean of its divisors is an integer number (954605940).

Almost surely, 2^28165980080 is an apocalyptic number.

28165980080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28165980080 is an abundant number, since it is smaller than the sum of its proper divisors (48202495120).

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

28165980080 is a wasteful number, since it uses less digits than its factorization.

28165980080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026491 (or 1026471 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 28165980080 in words is "twenty-eight billion, one hundred sixty-five million, nine hundred eighty thousand, eighty".