28984156887 has 16 divisors (see below), whose sum is σ = 44210665472. Its totient is φ = 16545751200.

The previous prime is 28984156871. The next prime is 28984156913. The reversal of 28984156887 is 78865148982.

It is not a de Polignac number, because 28984156887 - 2⁴ = 28984156871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28984156387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671239 + ... + 713112.

It is an arithmetic number, because the mean of its divisors is an integer number (2763166592).

Almost surely, 2^28984156887 is an apocalyptic number.

28984156887 is a deficient number, since it is larger than the sum of its proper divisors (15226508585).

28984156887 is a wasteful number, since it uses less digits than its factorization.

28984156887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385358.

The product of its digits is 61931520, while the sum is 66.

The spelling of 28984156887 in words is "twenty-eight billion, nine hundred eighty-four million, one hundred fifty-six thousand, eight hundred eighty-seven".