28273415479 has 4 divisors (see below), whose sum is σ = 29936557584. Its totient is φ = 26610273376.

The previous prime is 28273415477. The next prime is 28273415543. The reversal of 28273415479 is 97451437282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97451437282 = 2 ⋅48725718641.

It is a cyclic number.

It is not a de Polignac number, because 28273415479 - 2¹ = 28273415477 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 (28273415477) 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, 831571027 + ... + 831571060.

It is an arithmetic number, because the mean of its divisors is an integer number (7484139396).

Almost surely, 2^28273415479 is an apocalyptic number.

28273415479 is a deficient number, since it is larger than the sum of its proper divisors (1663142105).

28273415479 is a wasteful number, since it uses less digits than its factorization.

28273415479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663142104.

The product of its digits is 3386880, while the sum is 52.

The spelling of 28273415479 in words is "twenty-eight billion, two hundred seventy-three million, four hundred fifteen thousand, four hundred seventy-nine".