28714171907 has 4 divisors (see below), whose sum is σ = 28728727440. Its totient is φ = 28699616376.

The previous prime is 28714171903. The next prime is 28714171961. The reversal of 28714171907 is 70917141782.

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 28714171907 - 2² = 28714171903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28714171903) 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, 7274807 + ... + 7278752.

It is an arithmetic number, because the mean of its divisors is an integer number (7182181860).

Almost surely, 2^28714171907 is an apocalyptic number.

28714171907 is a deficient number, since it is larger than the sum of its proper divisors (14555533).

28714171907 is a wasteful number, since it uses less digits than its factorization.

28714171907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14555532.

The product of its (nonzero) digits is 197568, while the sum is 47.

The spelling of 28714171907 in words is "twenty-eight billion, seven hundred fourteen million, one hundred seventy-one thousand, nine hundred seven".