28066726088 has 16 divisors (see below), whose sum is σ = 52630013580. Its totient is φ = 14032055808.

The previous prime is 28066726081. The next prime is 28066726111. The reversal of 28066726088 is 88062766082.

It can be written as a sum of positive squares in 2 ways, for example, as 27721584004 + 345142084 = 166498^2 + 18578^2 .

It is a super-2 number, since 2×28066726088² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28066726081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68945 + ... + 246752.

Almost surely, 2^28066726088 is an apocalyptic number.

It is an amenable number.

28066726088 is a deficient number, since it is larger than the sum of its proper divisors (24563287492).

28066726088 is a wasteful number, since it uses less digits than its factorization.

28066726088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326816 (or 326812 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 28066726088 in words is "twenty-eight billion, sixty-six million, seven hundred twenty-six thousand, eighty-eight".