28010905556089 has 9 divisors (see below), whose sum is σ = 28057944958149. Its totient is φ = 27963944910780.

The previous prime is 28010905556003. The next prime is 28010905556099. The reversal of 28010905556089 is 98065550901082.

The square root of 28010905556089 is 5292533.

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

It is not a de Polignac number, because 28010905556089 - 2³¹ = 28008758072441 is a prime.

It is a super-2 number, since 2×28010905556089² (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 (28010905556099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3403094604 + ... + 3403102834.

Almost surely, 2^{28010905556089} is an apocalyptic number.

28010905556089 is the 5292533-rd square number.

28010905556089 is the 2646267-th centered octagonal number.

It is an amenable number.

28010905556089 is a deficient number, since it is larger than the sum of its proper divisors (47039402060).

28010905556089 is an frugal number, since it uses more digits than its factorization.

28010905556089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17748 (or 8874 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 58.

The spelling of 28010905556089 in words is "twenty-eight trillion, ten billion, nine hundred five million, five hundred fifty-six thousand, eighty-nine".