28418865540 has 96 divisors (see below), whose sum is σ = 86062144896. Its totient is φ = 6965345280.

The previous prime is 28418865529. The next prime is 28418865547. The reversal of 28418865540 is 4556881482.

It is not an unprimeable number, because it can be changed into a prime (28418865547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103555 + ... + 259925.

It is an arithmetic number, because the mean of its divisors is an integer number (896480676).

Almost surely, 2^28418865540 is an apocalyptic number.

28418865540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28418865540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43031072448).

28418865540 is an abundant number, since it is smaller than the sum of its proper divisors (57643279356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28418865540 is a wasteful number, since it uses less digits than its factorization.

28418865540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156629 (or 156627 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 51.

The spelling of 28418865540 in words is "twenty-eight billion, four hundred eighteen million, eight hundred sixty-five thousand, five hundred forty".