28131233603 has 8 divisors (see below), whose sum is σ = 30690518976. Its totient is φ = 25572265000.

The previous prime is 28131233563. The next prime is 28131233657. The reversal of 28131233603 is 30633213182.

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-28131233603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28131233603.

It is not an unprimeable number, because it can be changed into a prime (28131233203) 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, 130700 + ... + 270822.

It is an arithmetic number, because the mean of its divisors is an integer number (3836314872).

Almost surely, 2^28131233603 is an apocalyptic number.

28131233603 is a deficient number, since it is larger than the sum of its proper divisors (2559285373).

28131233603 is a wasteful number, since it uses less digits than its factorization.

28131233603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158385.

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 28131233603 its reverse (30633213182), we get a palindrome (58764446785).

The spelling of 28131233603 in words is "twenty-eight billion, one hundred thirty-one million, two hundred thirty-three thousand, six hundred three".