28194928564 has 48 divisors (see below), whose sum is σ = 55714276800. Its totient is φ = 12366950400.

The previous prime is 28194928561. The next prime is 28194928669. The reversal of 28194928564 is 46582949182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a junction number, because it is equal to n+sod(n) for n = 28194928499 and 28194928508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28194928561) 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 15 ways as a sum of consecutive naturals, for example, 2713972 + ... + 2724340.

It is an arithmetic number, because the mean of its divisors is an integer number (1160714100).

Almost surely, 2^28194928564 is an apocalyptic number.

It is an amenable number.

28194928564 is a deficient number, since it is larger than the sum of its proper divisors (27519348236).

28194928564 is a wasteful number, since it uses less digits than its factorization.

28194928564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12544 (or 12542 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 58.

The spelling of 28194928564 in words is "twenty-eight billion, one hundred ninety-four million, nine hundred twenty-eight thousand, five hundred sixty-four".