28280761548 has 24 divisors (see below), whose sum is σ = 71064478128. Its totient is φ = 8701772736.

The previous prime is 28280761543. The next prime is 28280761583. The reversal of 28280761548 is 84516708282.

It is a self number, because there is not a number n which added to its sum of digits gives 28280761548.

It is not an unprimeable number, because it can be changed into a prime (28280761541) by changing a digit.

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, 90643311 + ... + 90643622.

It is an arithmetic number, because the mean of its divisors is an integer number (2961019922).

Almost surely, 2^28280761548 is an apocalyptic number.

It is an amenable number.

28280761548 is an abundant number, since it is smaller than the sum of its proper divisors (42783716580).

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

28280761548 is a wasteful number, since it uses less digits than its factorization.

28280761548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181286953 (or 181286951 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 51.

The spelling of 28280761548 in words is "twenty-eight billion, two hundred eighty million, seven hundred sixty-one thousand, five hundred forty-eight".