28887158887443 has 20 divisors (see below), whose sum is σ = 43160487549168. Its totient is φ = 19254506662800.

The previous prime is 28887158887427. The next prime is 28887158887589. The reversal of 28887158887443 is 34478885178882.

28887158887443 is a `hidden beast` number, since 2 + 8 + 8 + 8 + 7 + 15 + 88 + 87 + 443 = 666.

It is not a de Polignac number, because 28887158887443 - 2⁴ = 28887158887427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (28887158887043) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32890396 + ... + 33757257.

Almost surely, 2^{28887158887443} is an apocalyptic number.

28887158887443 is a deficient number, since it is larger than the sum of its proper divisors (14273328661725).

28887158887443 is an equidigital number, since it uses as much as digits as its factorization.

28887158887443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66653016 (or 66653007 counting only the distinct ones).

The product of its digits is 6165626880, while the sum is 81.

The spelling of 28887158887443 in words is "twenty-eight trillion, eight hundred eighty-seven billion, one hundred fifty-eight million, eight hundred eighty-seven thousand, four hundred forty-three".