28518093240 has 256 divisors, whose sum is σ = 105805163520. Its totient is φ = 5988003840.

The previous prime is 28518093229. The next prime is 28518093293. The reversal of 28518093240 is 4239081582.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 28518093192 and 28518093201.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2297932 + ... + 2310308.

It is an arithmetic number, because the mean of its divisors is an integer number (413301420).

Almost surely, 2^28518093240 is an apocalyptic number.

28518093240 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 28518093240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52902581760).

28518093240 is an abundant number, since it is smaller than the sum of its proper divisors (77287070280).

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

28518093240 is a wasteful number, since it uses less digits than its factorization.

28518093240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12622 (or 12618 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 28518093240 in words is "twenty-eight billion, five hundred eighteen million, ninety-three thousand, two hundred forty".