28360747881361 has 9 divisors (see below), whose sum is σ = 32991117430761. Its totient is φ = 24309180516852.

The previous prime is 28360747881331. The next prime is 28360747881379. The reversal of 28360747881361 is 16318874706382.

The square root of 28360747881361 is 5325481.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 28360747881361 - 2⁷ = 28360747881233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28360747881293 and 28360747881302.

It is not an unprimeable number, because it can be changed into a prime (28360747881331) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36897976 + ... + 37658758.

It is an arithmetic number, because the mean of its divisors is an integer number (3665679714529).

Almost surely, 2^{28360747881361} is an apocalyptic number.

28360747881361 is the 5325481-st square number.

28360747881361 is the 2662741-st centered octagonal number.

It is an amenable number.

28360747881361 is a deficient number, since it is larger than the sum of its proper divisors (4630369549400).

28360747881361 is an frugal number, since it uses more digits than its factorization.

28360747881361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521580 (or 760790 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 64.

The spelling of 28360747881361 in words is "twenty-eight trillion, three hundred sixty billion, seven hundred forty-seven million, eight hundred eighty-one thousand, three hundred sixty-one".