28018974720 has 448 divisors, whose sum is σ = 103047759360. Its totient is φ = 6429081600.

The previous prime is 28018974713. The next prime is 28018974721. The reversal of 28018974720 is 2747981082.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28018974720.

It is not an unprimeable number, because it can be changed into a prime (28018974721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25681375 + ... + 25682465.

It is an arithmetic number, because the mean of its divisors is an integer number (230017320).

Almost surely, 2^28018974720 is an apocalyptic number.

28018974720 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 28018974720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51523879680).

28018974720 is an abundant number, since it is smaller than the sum of its proper divisors (75028784640).

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

28018974720 is a wasteful number, since it uses less digits than its factorization.

28018974720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 28018974720 in words is "twenty-eight billion, eighteen million, nine hundred seventy-four thousand, seven hundred twenty".