28254864979 has 8 divisors (see below), whose sum is σ = 30824821872. Its totient is φ = 25685130240.

The previous prime is 28254864973. The next prime is 28254864997. The reversal of 28254864979 is 97946845282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28254864979 - 2¹³ = 28254856787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28254864979.

It is not an unprimeable number, because it can be changed into a prime (28254864973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322047 + ... + 400279.

It is an arithmetic number, because the mean of its divisors is an integer number (3853102734).

Almost surely, 2^28254864979 is an apocalyptic number.

28254864979 is a deficient number, since it is larger than the sum of its proper divisors (2569956893).

28254864979 is a wasteful number, since it uses less digits than its factorization.

28254864979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111077.

The product of its digits is 69672960, while the sum is 64.

The spelling of 28254864979 in words is "twenty-eight billion, two hundred fifty-four million, eight hundred sixty-four thousand, nine hundred seventy-nine".