28406930947199 has 4 divisors (see below), whose sum is σ = 32465063939664. Its totient is φ = 24348797954736.

The previous prime is 28406930947193. The next prime is 28406930947211. The reversal of 28406930947199 is 99174903960482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28406930947199 - 2²⁰ = 28406929898623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28406930947193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029066496222 + ... + 2029066496235.

It is an arithmetic number, because the mean of its divisors is an integer number (8116265984916).

Almost surely, 2^{28406930947199} is an apocalyptic number.

28406930947199 is a deficient number, since it is larger than the sum of its proper divisors (4058132992465).

28406930947199 is an equidigital number, since it uses as much as digits as its factorization.

28406930947199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058132992464.

The product of its (nonzero) digits is 211631616, while the sum is 71.

The spelling of 28406930947199 in words is "twenty-eight trillion, four hundred six billion, nine hundred thirty million, nine hundred forty-seven thousand, one hundred ninety-nine".