7728228488 has 12 divisors (see below), whose sum is σ = 14490894645. Its totient is φ = 3863989920.

The previous prime is 7728228479. The next prime is 7728228503. The reversal of 7728228488 is 8848228277.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 7399096324 + 329132164 = 86018^2 + 18142^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=62162.

It is a super-2 number, since 2×7728228488² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 233108 + ... + 264188.

Almost surely, 2^7728228488 is an apocalyptic number.

It is an amenable number.

7728228488 is a deficient number, since it is larger than the sum of its proper divisors (6762666157).

7728228488 is an frugal number, since it uses more digits than its factorization.

7728228488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62168 (or 31083 counting only the distinct ones).

The product of its digits is 6422528, while the sum is 56.

The square root of 7728228488 is about 87910.3434642363. The cubic root of 7728228488 is about 1977.0909639682.

The spelling of 7728228488 in words is "seven billion, seven hundred twenty-eight million, two hundred twenty-eight thousand, four hundred eighty-eight".