28318155403 has 4 divisors (see below), whose sum is σ = 28505693008. Its totient is φ = 28130617800.

The previous prime is 28318155347. The next prime is 28318155421. The reversal of 28318155403 is 30455181382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28318155403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28318125403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93768576 + ... + 93768877.

It is an arithmetic number, because the mean of its divisors is an integer number (7126423252).

Almost surely, 2^28318155403 is an apocalyptic number.

28318155403 is a deficient number, since it is larger than the sum of its proper divisors (187537605).

28318155403 is a wasteful number, since it uses less digits than its factorization.

28318155403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187537604.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 28318155403 in words is "twenty-eight billion, three hundred eighteen million, one hundred fifty-five thousand, four hundred three".