28903060081 has 27 divisors (see below), whose sum is σ = 34058029131. Its totient is φ = 24456814704.

The previous prime is 28903060031. The next prime is 28903060097. The reversal of 28903060081 is 18006030982.

The square root of 28903060081 is 170009.

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

It can be written as a sum of positive squares in only one way, i.e., 3386192481 + 25516867600 = 58191^2 + 159740^2 .

It is not a de Polignac number, because 28903060081 - 2⁹ = 28903059569 is a prime.

It is a super-2 number, since 2×28903060081² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28903060081.

It is not an unprimeable number, because it can be changed into a prime (28903060031) 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, 177319306 + ... + 177319468.

Almost surely, 2^28903060081 is an apocalyptic number.

28903060081 is the 170009-th square number.

28903060081 is the 85005-th centered octagonal number.

It is an amenable number.

28903060081 is a deficient number, since it is larger than the sum of its proper divisors (5154969050).

28903060081 is an frugal number, since it uses more digits than its factorization.

28903060081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

Multiplying 28903060081 by its product of nonzero digits (20736), we get a square (599333853839616 = 24481296²).

The spelling of 28903060081 in words is "twenty-eight billion, nine hundred three million, sixty thousand, eighty-one".