28639478094479 has 8 divisors (see below), whose sum is σ = 34453507482240. Its totient is φ = 23256117550296.

The previous prime is 28639478094443. The next prime is 28639478094523. The reversal of 28639478094479 is 97449087493682.

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 28639478094479 - 2¹⁶ = 28639478028943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28639478094439) 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, 107667210749 + ... + 107667211014.

It is an arithmetic number, because the mean of its divisors is an integer number (4306688435280).

Almost surely, 2^{28639478094479} is an apocalyptic number.

28639478094479 is a deficient number, since it is larger than the sum of its proper divisors (5814029387761).

28639478094479 is a wasteful number, since it uses less digits than its factorization.

28639478094479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215334421789.

The product of its (nonzero) digits is 5267275776, while the sum is 80.

The spelling of 28639478094479 in words is "twenty-eight trillion, six hundred thirty-nine billion, four hundred seventy-eight million, ninety-four thousand, four hundred seventy-nine".