28338547240 has 128 divisors (see below), whose sum is σ = 66044160000. Its totient is φ = 10938647808.

The previous prime is 28338547231. The next prime is 28338547247. The reversal of 28338547240 is 4274583382.

It is not an unprimeable number, because it can be changed into a prime (28338547247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38979757 + ... + 38980483.

It is an arithmetic number, because the mean of its divisors is an integer number (515970000).

Almost surely, 2^28338547240 is an apocalyptic number.

28338547240 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 28338547240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080000).

28338547240 is an abundant number, since it is smaller than the sum of its proper divisors (37705612760).

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

28338547240 is a wasteful number, since it uses less digits than its factorization.

28338547240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 46.

It can be divided in two parts, 283385 and 47240, that added together give a square (330625 = 575²).

The spelling of 28338547240 in words is "twenty-eight billion, three hundred thirty-eight million, five hundred forty-seven thousand, two hundred forty".