28081672667 has 8 divisors (see below), whose sum is σ = 28228965600. Its totient is φ = 27934441920.

The previous prime is 28081672651. The next prime is 28081672711. The reversal of 28081672667 is 76627618082.

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

It is not a de Polignac number, because 28081672667 - 2⁴ = 28081672651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28081677667) 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, 1096367 + ... + 1121687.

It is an arithmetic number, because the mean of its divisors is an integer number (3528620700).

Almost surely, 2^28081672667 is an apocalyptic number.

28081672667 is a deficient number, since it is larger than the sum of its proper divisors (147292933).

28081672667 is a wasteful number, since it uses less digits than its factorization.

28081672667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31093.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 28081672667 in words is "twenty-eight billion, eighty-one million, six hundred seventy-two thousand, six hundred sixty-seven".