28018048840 has 64 divisors (see below), whose sum is σ = 66795840000. Its totient is φ = 10540551168.

The previous prime is 28018048819. The next prime is 28018048841. The reversal of 28018048840 is 4884081082.

It is a happy number.

It is a super-2 number, since 2×28018048840² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28018048841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1005577 + ... + 1033063.

It is an arithmetic number, because the mean of its divisors is an integer number (1043685000).

Almost surely, 2^28018048840 is an apocalyptic number.

28018048840 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 28018048840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33397920000).

28018048840 is an abundant number, since it is smaller than the sum of its proper divisors (38777791160).

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

28018048840 is a wasteful number, since it uses less digits than its factorization.

28018048840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29014 (or 29010 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 43.

The spelling of 28018048840 in words is "twenty-eight billion, eighteen million, forty-eight thousand, eight hundred forty".