28485133357 has 6 divisors (see below), whose sum is σ = 29777465102. Its totient is φ = 27246648792.

The previous prime is 28485133321. The next prime is 28485133361. The reversal of 28485133357 is 75333158482.

It can be written as a sum of positive squares in only one way, i.e., 25236817321 + 3248316036 = 158861^2 + 56994^2 .

It is not a de Polignac number, because 28485133357 - 2²³ = 28476744749 is a prime.

It is a super-2 number, since 2×28485133357² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28485133357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28485137357) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26923038 + ... + 26924095.

Almost surely, 2^28485133357 is an apocalyptic number.

It is an amenable number.

28485133357 is a deficient number, since it is larger than the sum of its proper divisors (1292331745).

28485133357 is an equidigital number, since it uses as much as digits as its factorization.

28485133357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53847179 (or 53847156 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 49.

The spelling of 28485133357 in words is "twenty-eight billion, four hundred eighty-five million, one hundred thirty-three thousand, three hundred fifty-seven".