28367646139 has 16 divisors (see below), whose sum is σ = 34336391616. Its totient is φ = 22878720000.

The previous prime is 28367646121. The next prime is 28367646149. The reversal of 28367646139 is 93164676382.

It is a cyclic number.

It is not a de Polignac number, because 28367646139 - 2⁵ = 28367646107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28367646139.

It is not an unprimeable number, because it can be changed into a prime (28367646149) 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, 446329 + ... + 505909.

It is an arithmetic number, because the mean of its divisors is an integer number (2146024476).

Almost surely, 2^28367646139 is an apocalyptic number.

28367646139 is a deficient number, since it is larger than the sum of its proper divisors (5968745477).

28367646139 is a wasteful number, since it uses less digits than its factorization.

28367646139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63606.

The product of its digits is 7838208, while the sum is 55.

The spelling of 28367646139 in words is "twenty-eight billion, three hundred sixty-seven million, six hundred forty-six thousand, one hundred thirty-nine".