28099206667 has 16 divisors (see below), whose sum is σ = 33121400832. Its totient is φ = 23339167200.

The previous prime is 28099206659. The next prime is 28099206679. The reversal of 28099206667 is 76660299082.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28099206667 - 2³ = 28099206659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28099206637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389583 + ... + 456040.

It is an arithmetic number, because the mean of its divisors is an integer number (2070087552).

Almost surely, 2^28099206667 is an apocalyptic number.

28099206667 is a deficient number, since it is larger than the sum of its proper divisors (5022194165).

28099206667 is a wasteful number, since it uses less digits than its factorization.

28099206667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845778.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 28099206667 in words is "twenty-eight billion, ninety-nine million, two hundred six thousand, six hundred sixty-seven".