28000550503 has 8 divisors (see below), whose sum is σ = 28335106800. Its totient is φ = 27666437568.

The previous prime is 28000550491. The next prime is 28000550507. The reversal of 28000550503 is 30505500082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28000550503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000550507) 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, 17100 + ... + 237262.

It is an arithmetic number, because the mean of its divisors is an integer number (3541888350).

Almost surely, 2^28000550503 is an apocalyptic number.

28000550503 is a deficient number, since it is larger than the sum of its proper divisors (334556297).

28000550503 is a wasteful number, since it uses less digits than its factorization.

28000550503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221681.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 28000550503 in words is "twenty-eight billion, five hundred fifty thousand, five hundred three".