28531503123 has 8 divisors (see below), whose sum is σ = 38043558336. Its totient is φ = 19020225000.

The previous prime is 28531503097. The next prime is 28531503127. The reversal of 28531503123 is 32130513582.

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

It is not a de Polignac number, because 28531503123 - 2¹² = 28531499027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28531503127) 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, 102393 + ... + 259898.

It is an arithmetic number, because the mean of its divisors is an integer number (4755444792).

Almost surely, 2^28531503123 is an apocalyptic number.

28531503123 is a deficient number, since it is larger than the sum of its proper divisors (9512055213).

28531503123 is a wasteful number, since it uses less digits than its factorization.

28531503123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388545.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 28531503123 in words is "twenty-eight billion, five hundred thirty-one million, five hundred three thousand, one hundred twenty-three".