28621768189289 has 8 divisors (see below), whose sum is σ = 31223788126560. Its totient is φ = 26019755087200.

The previous prime is 28621768189279. The next prime is 28621768189321. The reversal of 28621768189289 is 98298186712682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28621768189289 is a prime.

It is a super-2 number, since 2×28621768189289² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28621768189279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11457434 + ... + 13730124.

It is an arithmetic number, because the mean of its divisors is an integer number (3902973515820).

Almost surely, 2^{28621768189289} is an apocalyptic number.

It is an amenable number.

28621768189289 is a deficient number, since it is larger than the sum of its proper divisors (2602019937271).

28621768189289 is a wasteful number, since it uses less digits than its factorization.

28621768189289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417591.

The product of its digits is 668860416, while the sum is 77.

The spelling of 28621768189289 in words is "twenty-eight trillion, six hundred twenty-one billion, seven hundred sixty-eight million, one hundred eighty-nine thousand, two hundred eighty-nine".