7228787328 has 768 divisors, whose sum is σ = 27460684800. Its totient is φ = 1881169920.

The previous prime is 7228787317. The next prime is 7228787333. The reversal of 7228787328 is 8237878227.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 233186673 + ... + 233186703.

It is an arithmetic number, because the mean of its divisors is an integer number (35756100).

Almost surely, 2^7228787328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7228787328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13730342400).

7228787328 is an abundant number, since it is smaller than the sum of its proper divisors (20231897472).

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

7228787328 is an equidigital number, since it uses as much as digits as its factorization.

7228787328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 60 counting only the distinct ones).

The product of its digits is 4214784, while the sum is 54.

The square root of 7228787328 is about 85022.2754811938. The cubic root of 7228787328 is about 1933.5488524967.

The spelling of 7228787328 in words is "seven billion, two hundred twenty-eight million, seven hundred eighty-seven thousand, three hundred twenty-eight".