28061169428 has 12 divisors (see below), whose sum is σ = 50800393140. Its totient is φ = 13546771392.

The previous prime is 28061169427. The next prime is 28061169467. The reversal of 28061169428 is 82496116082.

It can be written as a sum of positive squares in 2 ways, for example, as 18862824964 + 9198344464 = 137342^2 + 95908^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28061169427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120953201 + ... + 120953432.

It is an arithmetic number, because the mean of its divisors is an integer number (4233366095).

Almost surely, 2^28061169428 is an apocalyptic number.

It is an amenable number.

28061169428 is a deficient number, since it is larger than the sum of its proper divisors (22739223712).

28061169428 is a wasteful number, since it uses less digits than its factorization.

28061169428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241906666 (or 241906664 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 28061169428 in words is "twenty-eight billion, sixty-one million, one hundred sixty-nine thousand, four hundred twenty-eight".