28867500123 has 64 divisors (see below), whose sum is σ = 50435481600. Its totient is φ = 14240540160.

The previous prime is 28867500119. The next prime is 28867500143. The reversal of 28867500123 is 32100576882.

It is not a de Polignac number, because 28867500123 - 2² = 28867500119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28867500113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 718963 + ... + 758051.

It is an arithmetic number, because the mean of its divisors is an integer number (788054400).

Almost surely, 2^28867500123 is an apocalyptic number.

28867500123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28867500123 is a deficient number, since it is larger than the sum of its proper divisors (21567981477).

28867500123 is a wasteful number, since it uses less digits than its factorization.

28867500123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39272.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 28867500123 in words is "twenty-eight billion, eight hundred sixty-seven million, five hundred thousand, one hundred twenty-three".