28112645805 has 8 divisors (see below), whose sum is σ = 44980233312. Its totient is φ = 14993411088.

The previous prime is 28112645797. The next prime is 28112645809. The reversal of 28112645805 is 50854621182.

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

It is not a de Polignac number, because 28112645805 - 2³ = 28112645797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28112645809) 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, 937088179 + ... + 937088208.

It is an arithmetic number, because the mean of its divisors is an integer number (5622529164).

Almost surely, 2^28112645805 is an apocalyptic number.

It is an amenable number.

28112645805 is a deficient number, since it is larger than the sum of its proper divisors (16867587507).

28112645805 is a wasteful number, since it uses less digits than its factorization.

28112645805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874176395.

The product of its (nonzero) digits is 153600, while the sum is 42.

The spelling of 28112645805 in words is "twenty-eight billion, one hundred twelve million, six hundred forty-five thousand, eight hundred five".