7288918728 has 128 divisors (see below), whose sum is σ = 22480416000. Its totient is φ = 1917812736.

The previous prime is 7288918727. The next prime is 7288918739. The reversal of 7288918728 is 8278198827.

It is not an unprimeable number, because it can be changed into a prime (7288918727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 976900 + ... + 984332.

It is an arithmetic number, because the mean of its divisors is an integer number (175628250).

Almost surely, 2^7288918728 is an apocalyptic number.

7288918728 is a gapful number since it is divisible by the number (78) 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 7288918728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11240208000).

7288918728 is an abundant number, since it is smaller than the sum of its proper divisors (15191497272).

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

7288918728 is a wasteful number, since it uses less digits than its factorization.

7288918728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911 (or 7907 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 60.

The square root of 7288918728 is about 85375.1645854929. The cubic root of 7288918728 is about 1938.8953508604.

The spelling of 7288918728 in words is "seven billion, two hundred eighty-eight million, nine hundred eighteen thousand, seven hundred twenty-eight".