28461857479 has 4 divisors (see below), whose sum is σ = 31049299080. Its totient is φ = 25874415880.

The previous prime is 28461857477. The next prime is 28461857533. The reversal of 28461857479 is 97475816482.

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

It is a cyclic number.

It is not a de Polignac number, because 28461857479 - 2¹ = 28461857477 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 (28461857471) 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, 1293720784 + ... + 1293720805.

It is an arithmetic number, because the mean of its divisors is an integer number (7762324770).

Almost surely, 2^28461857479 is an apocalyptic number.

28461857479 is a deficient number, since it is larger than the sum of its proper divisors (2587441601).

28461857479 is a wasteful number, since it uses less digits than its factorization.

28461857479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587441600.

The product of its digits is 27095040, while the sum is 61.

The spelling of 28461857479 in words is "twenty-eight billion, four hundred sixty-one million, eight hundred fifty-seven thousand, four hundred seventy-nine".