28503944988 has 24 divisors (see below), whose sum is σ = 69400910208. Its totient is φ = 9088214256.

The previous prime is 28503944983. The next prime is 28503945031. The reversal of 28503944988 is 88944930582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28503944983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51637306 + ... + 51637857.

It is an arithmetic number, because the mean of its divisors is an integer number (2891704592).

Almost surely, 2^28503944988 is an apocalyptic number.

It is an amenable number.

28503944988 is an abundant number, since it is smaller than the sum of its proper divisors (40896965220).

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

28503944988 is a wasteful number, since it uses less digits than its factorization.

28503944988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103275193 (or 103275191 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 28503944988 in words is "twenty-eight billion, five hundred three million, nine hundred forty-four thousand, nine hundred eighty-eight".