28545441231 has 16 divisors (see below), whose sum is σ = 38453027328. Its totient is φ = 18834228000.

The previous prime is 28545441191. The next prime is 28545441247. The reversal of 28545441231 is 13214454582.

It is not a de Polignac number, because 28545441231 - 2⁹ = 28545440719 is a prime.

It is a super-2 number, since 2×28545441231² (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 28545441231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545445231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784246 + ... + 819836.

It is an arithmetic number, because the mean of its divisors is an integer number (2403314208).

Almost surely, 2^28545441231 is an apocalyptic number.

28545441231 is a deficient number, since it is larger than the sum of its proper divisors (9907586097).

28545441231 is a wasteful number, since it uses less digits than its factorization.

28545441231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38342.

The product of its digits is 153600, while the sum is 39.

The spelling of 28545441231 in words is "twenty-eight billion, five hundred forty-five million, four hundred forty-one thousand, two hundred thirty-one".