28332726386261 has 16 divisors (see below), whose sum is σ = 31506726427200. Its totient is φ = 25258909278720.

The previous prime is 28332726386197. The next prime is 28332726386273. The reversal of 28332726386261 is 16268362723382.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28332726386261 - 2⁶ = 28332726386197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28332726386261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28332726386281) 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, 10451036 + ... + 12879813.

It is an arithmetic number, because the mean of its divisors is an integer number (1969170401700).

Almost surely, 2^{28332726386261} is an apocalyptic number.

It is an amenable number.

28332726386261 is a deficient number, since it is larger than the sum of its proper divisors (3174000040939).

28332726386261 is a wasteful number, since it uses less digits than its factorization.

28332726386261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23332996.

The product of its digits is 41803776, while the sum is 59.

The spelling of 28332726386261 in words is "twenty-eight trillion, three hundred thirty-two billion, seven hundred twenty-six million, three hundred eighty-six thousand, two hundred sixty-one".