7728263081 has 16 divisors (see below), whose sum is σ = 9646801920. Its totient is φ = 6014795280.

The previous prime is 7728263071. The next prime is 7728263183. The reversal of 7728263081 is 1803628277.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7728263081 - 2³⁰ = 6654521257 is a prime.

It is a super-2 number, since 2×7728263081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7728263071) 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, 4790 + ... + 124416.

It is an arithmetic number, because the mean of its divisors is an integer number (602925120).

Almost surely, 2^7728263081 is an apocalyptic number.

It is an amenable number.

7728263081 is a deficient number, since it is larger than the sum of its proper divisors (1918538839).

7728263081 is a wasteful number, since it uses less digits than its factorization.

7728263081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120484.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 7728263081 is about 87910.5402156078. The cubic root of 7728263081 is about 1977.0939139072.

The spelling of 7728263081 in words is "seven billion, seven hundred twenty-eight million, two hundred sixty-three thousand, eighty-one".