28618918879 has 8 divisors (see below), whose sum is σ = 29286872912. Its totient is φ = 27951073920.

The previous prime is 28618918873. The next prime is 28618918903. The reversal of 28618918879 is 97881981682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28618918879 - 2¹⁹ = 28618394591 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 (28618918873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776677 + ... + 812689.

It is an arithmetic number, because the mean of its divisors is an integer number (3660859114).

Almost surely, 2^28618918879 is an apocalyptic number.

28618918879 is a deficient number, since it is larger than the sum of its proper divisors (667954033).

28618918879 is a wasteful number, since it uses less digits than its factorization.

28618918879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54537.

The product of its digits is 27869184, while the sum is 67.

The spelling of 28618918879 in words is "twenty-eight billion, six hundred eighteen million, nine hundred eighteen thousand, eight hundred seventy-nine".