28113158890 has 16 divisors (see below), whose sum is σ = 50624494632. Its totient is φ = 11240639424.

The previous prime is 28113158881. The next prime is 28113158947. The reversal of 28113158890 is 9885131182.

It can be written as a sum of positive squares in 4 ways, for example, as 27113903569 + 999255321 = 164663^2 + 31611^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28113158890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552429 + ... + 601168.

Almost surely, 2^28113158890 is an apocalyptic number.

28113158890 is a deficient number, since it is larger than the sum of its proper divisors (22511335742).

28113158890 is a wasteful number, since it uses less digits than its factorization.

28113158890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156041.

The product of its (nonzero) digits is 138240, while the sum is 46.

The spelling of 28113158890 in words is "twenty-eight billion, one hundred thirteen million, one hundred fifty-eight thousand, eight hundred ninety".