28987654855 has 16 divisors (see below), whose sum is σ = 37162500480. Its totient is φ = 21641681952.

The previous prime is 28987654849. The next prime is 28987654897. The reversal of 28987654855 is 55845678982.

It is a cyclic number.

It is not a de Polignac number, because 28987654855 - 2⁵ = 28987654823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2270749 + ... + 2283478.

It is an arithmetic number, because the mean of its divisors is an integer number (2322656280).

Almost surely, 2^28987654855 is an apocalyptic number.

28987654855 is a deficient number, since it is larger than the sum of its proper divisors (8174845625).

28987654855 is a wasteful number, since it uses less digits than its factorization.

28987654855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554318.

The product of its digits is 193536000, while the sum is 67.

The spelling of 28987654855 in words is "twenty-eight billion, nine hundred eighty-seven million, six hundred fifty-four thousand, eight hundred fifty-five".