28129230479 has 8 divisors (see below), whose sum is σ = 32149770240. Its totient is φ = 24109210296.

The previous prime is 28129230469. The next prime is 28129230497. The reversal of 28129230479 is 97403292182.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28129230479 - 2²⁸ = 27860795023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28129230419) 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, 5999 + ... + 237264.

It is an arithmetic number, because the mean of its divisors is an integer number (4018721280).

Almost surely, 2^28129230479 is an apocalyptic number.

28129230479 is a deficient number, since it is larger than the sum of its proper divisors (4020539761).

28129230479 is a wasteful number, since it uses less digits than its factorization.

28129230479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259789.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 28129230479 in words is "twenty-eight billion, one hundred twenty-nine million, two hundred thirty thousand, four hundred seventy-nine".