28158361756 has 18 divisors (see below), whose sum is σ = 57322379688. Its totient is φ = 12067869240.

The previous prime is 28158361753. The next prime is 28158361787. The reversal of 28158361756 is 65716385182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28158361753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71832360 + ... + 71832751.

Almost surely, 2^28158361756 is an apocalyptic number.

It is an amenable number.

28158361756 is an abundant number, since it is smaller than the sum of its proper divisors (29164017932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28158361756 is a wasteful number, since it uses less digits than its factorization.

28158361756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143665129 (or 143665120 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The spelling of 28158361756 in words is "twenty-eight billion, one hundred fifty-eight million, three hundred sixty-one thousand, seven hundred fifty-six".