28365254547 has 32 divisors (see below), whose sum is σ = 43593449472. Its totient is φ = 16070068224.

The previous prime is 28365254539. The next prime is 28365254581. The reversal of 28365254547 is 74545256382.

It is not a de Polignac number, because 28365254547 - 2³ = 28365254539 is a prime.

It is a super-2 number, since 2×28365254547² (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 28365254547.

It is not an unprimeable number, because it can be changed into a prime (28365254507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5376703 + ... + 5381975.

It is an arithmetic number, because the mean of its divisors is an integer number (1362295296).

Almost surely, 2^28365254547 is an apocalyptic number.

28365254547 is a deficient number, since it is larger than the sum of its proper divisors (15228194925).

28365254547 is a wasteful number, since it uses less digits than its factorization.

28365254547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7427.

The product of its digits is 8064000, while the sum is 51.

The spelling of 28365254547 in words is "twenty-eight billion, three hundred sixty-five million, two hundred fifty-four thousand, five hundred forty-seven".