28452172539 has 16 divisors (see below), whose sum is σ = 43410806528. Its totient is φ = 16237716192.

The previous prime is 28452172537. The next prime is 28452172543. The reversal of 28452172539 is 93527125482.

It is not a de Polignac number, because 28452172539 - 2¹ = 28452172537 is a prime.

It is a super-2 number, since 2×28452172539² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28452172537) 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 15 ways as a sum of consecutive naturals, for example, 844252 + ... + 877305.

It is an arithmetic number, because the mean of its divisors is an integer number (2713175408).

Almost surely, 2^28452172539 is an apocalyptic number.

28452172539 is a deficient number, since it is larger than the sum of its proper divisors (14958633989).

28452172539 is a wasteful number, since it uses less digits than its factorization.

28452172539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722354.

The product of its digits is 1209600, while the sum is 48.

The spelling of 28452172539 in words is "twenty-eight billion, four hundred fifty-two million, one hundred seventy-two thousand, five hundred thirty-nine".