28458586646281 has 27 divisors (see below), whose sum is σ = 31667764926637. Its totient is φ = 25555363859960.

The previous prime is 28458586646279. The next prime is 28458586646309. The reversal of 28458586646281 is 18264668585482.

The square root of 28458586646281 is 5334659.

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

It is not a de Polignac number, because 28458586646281 - 2¹ = 28458586646279 is a prime.

It is a super-2 number, since 2×28458586646281² (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 (28458586641281) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4870540746 + ... + 4870546588.

Almost surely, 2^{28458586646281} is an apocalyptic number.

28458586646281 is the 5334659-th square number.

28458586646281 is the 2667330-th centered octagonal number.

It is an amenable number.

28458586646281 is a deficient number, since it is larger than the sum of its proper divisors (3209178280356).

28458586646281 is an frugal number, since it uses more digits than its factorization.

28458586646281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11874 (or 5937 counting only the distinct ones).

The product of its digits is 1415577600, while the sum is 73.

The spelling of 28458586646281 in words is "twenty-eight trillion, four hundred fifty-eight billion, five hundred eighty-six million, six hundred forty-six thousand, two hundred eighty-one".