28123349192 has 8 divisors (see below), whose sum is σ = 52731279750. Its totient is φ = 14061674592.

The previous prime is 28123349183. The next prime is 28123349201. The reversal of 28123349192 is 29194332182.

It is an interprime number because it is at equal distance from previous prime (28123349183) and next prime (28123349201).

It can be written as a sum of positive squares in only one way, i.e., 23637832516 + 4485516676 = 153746^2 + 66974^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1757709317 + ... + 1757709332.

Almost surely, 2^28123349192 is an apocalyptic number.

It is an amenable number.

28123349192 is a deficient number, since it is larger than the sum of its proper divisors (24607930558).

28123349192 is a wasteful number, since it uses less digits than its factorization.

28123349192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515418655 (or 3515418651 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The spelling of 28123349192 in words is "twenty-eight billion, one hundred twenty-three million, three hundred forty-nine thousand, one hundred ninety-two".