28279850018 has 16 divisors (see below), whose sum is σ = 50151458880. Its totient is φ = 11702006736.

The previous prime is 28279850017. The next prime is 28279850023. The reversal of 28279850018 is 81005897282.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28279850017) 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, 34826996 + ... + 34827807.

It is an arithmetic number, because the mean of its divisors is an integer number (3134466180).

Almost surely, 2^28279850018 is an apocalyptic number.

28279850018 is a deficient number, since it is larger than the sum of its proper divisors (21871608862).

28279850018 is a wasteful number, since it uses less digits than its factorization.

28279850018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69654841.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 28279850018 in words is "twenty-eight billion, two hundred seventy-nine million, eight hundred fifty thousand, eighteen".