28765323660 has 96 divisors (see below), whose sum is σ = 84737564352. Its totient is φ = 7281377280.

The previous prime is 28765323607. The next prime is 28765323679. The reversal of 28765323660 is 6632356782.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66997 + ... + 249036.

It is an arithmetic number, because the mean of its divisors is an integer number (882682962).

Almost surely, 2^28765323660 is an apocalyptic number.

28765323660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28765323660 is an abundant number, since it is smaller than the sum of its proper divisors (55972240692).

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

28765323660 is a wasteful number, since it uses less digits than its factorization.

28765323660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316123 (or 316121 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 28765323660 in words is "twenty-eight billion, seven hundred sixty-five million, three hundred twenty-three thousand, six hundred sixty".