28423088081 has 2 divisors, whose sum is σ = 28423088082. Its totient is φ = 28423088080.

The previous prime is 28423088003. The next prime is 28423088129. The reversal of 28423088081 is 18088032482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27917063056 + 506025025 = 167084^2 + 22495^2 .

It is a cyclic number.

It is not a de Polignac number, because 28423088081 - 2²² = 28418893777 is a prime.

It is a super-2 number, since 2×28423088081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28423088381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14211544040 + 14211544041.

It is an arithmetic number, because the mean of its divisors is an integer number (14211544041).

Almost surely, 2^28423088081 is an apocalyptic number.

It is an amenable number.

28423088081 is a deficient number, since it is larger than the sum of its proper divisors (1).

28423088081 is an equidigital number, since it uses as much as digits as its factorization.

28423088081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 28423088081 in words is "twenty-eight billion, four hundred twenty-three million, eighty-eight thousand, eighty-one".