28269387479 has 4 divisors (see below), whose sum is σ = 28272659376. Its totient is φ = 28266115584.

The previous prime is 28269387473. The next prime is 28269387541. The reversal of 28269387479 is 97478396282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28269387479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28269387473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1622954 + ... + 1640279.

It is an arithmetic number, because the mean of its divisors is an integer number (7068164844).

Almost surely, 2^28269387479 is an apocalyptic number.

28269387479 is a deficient number, since it is larger than the sum of its proper divisors (3271897).

28269387479 is an equidigital number, since it uses as much as digits as its factorization.

28269387479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271896.

The product of its digits is 73156608, while the sum is 65.

The spelling of 28269387479 in words is "twenty-eight billion, two hundred sixty-nine million, three hundred eighty-seven thousand, four hundred seventy-nine".