28287524667 has 4 divisors (see below), whose sum is σ = 37716699560. Its totient is φ = 18858349776.

The previous prime is 28287524659. The next prime is 28287524677. The reversal of 28287524667 is 76642578282.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28287524667 - 2³ = 28287524659 is a prime.

It is a super-2 number, since 2×28287524667² (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 (28287524677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4714587442 + ... + 4714587447.

It is an arithmetic number, because the mean of its divisors is an integer number (9429174890).

Almost surely, 2^28287524667 is an apocalyptic number.

28287524667 is a deficient number, since it is larger than the sum of its proper divisors (9429174893).

28287524667 is an equidigital number, since it uses as much as digits as its factorization.

28287524667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9429174892.

The product of its digits is 18063360, while the sum is 57.

The spelling of 28287524667 in words is "twenty-eight billion, two hundred eighty-seven million, five hundred twenty-four thousand, six hundred sixty-seven".