28158312103 has 8 divisors (see below), whose sum is σ = 28351122800. Its totient is φ = 27965746368.

The previous prime is 28158312101. The next prime is 28158312107. The reversal of 28158312103 is 30121385182.

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

It is a cyclic number.

It is not a de Polignac number, because 28158312103 - 2¹ = 28158312101 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 (28158312101) 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, 172483 + ... + 293371.

It is an arithmetic number, because the mean of its divisors is an integer number (3543890350).

Almost surely, 2^28158312103 is an apocalyptic number.

28158312103 is a deficient number, since it is larger than the sum of its proper divisors (192810697).

28158312103 is a wasteful number, since it uses less digits than its factorization.

28158312103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122481.

The product of its (nonzero) digits is 11520, while the sum is 34.

Adding to 28158312103 its reverse (30121385182), we get a palindrome (58279697285).

The spelling of 28158312103 in words is "twenty-eight billion, one hundred fifty-eight million, three hundred twelve thousand, one hundred three".