28667608478 has 8 divisors (see below), whose sum is σ = 43024038840. Its totient is φ = 14326262200.

The previous prime is 28667608477. The next prime is 28667608511. The reversal of 28667608478 is 87480676682.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28667608478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28667608477) 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, 3766268 + ... + 3773871.

It is an arithmetic number, because the mean of its divisors is an integer number (5378004855).

Almost surely, 2^28667608478 is an apocalyptic number.

28667608478 is a deficient number, since it is larger than the sum of its proper divisors (14356430362).

28667608478 is a wasteful number, since it uses less digits than its factorization.

28667608478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7542042.

The product of its (nonzero) digits is 43352064, while the sum is 62.

The spelling of 28667608478 in words is "twenty-eight billion, six hundred sixty-seven million, six hundred eight thousand, four hundred seventy-eight".