28312752123 has 8 divisors (see below), whose sum is σ = 41944818000. Its totient is φ = 18875168064.

The previous prime is 28312752103. The next prime is 28312752133. The reversal of 28312752123 is 32125721382.

28312752123 is a `hidden beast` number, since 2 + 8 + 3 + 127 + 521 + 2 + 3 = 666.

It is not a de Polignac number, because 28312752123 - 2¹³ = 28312743931 is a prime.

It is a super-2 number, since 2×28312752123² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28312752103) 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, 524310198 + ... + 524310251.

It is an arithmetic number, because the mean of its divisors is an integer number (5243102250).

Almost surely, 2^28312752123 is an apocalyptic number.

28312752123 is a deficient number, since it is larger than the sum of its proper divisors (13632065877).

28312752123 is a wasteful number, since it uses less digits than its factorization.

28312752123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048620458 (or 1048620452 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The spelling of 28312752123 in words is "twenty-eight billion, three hundred twelve million, seven hundred fifty-two thousand, one hundred twenty-three".