28306443307 has 4 divisors (see below), whose sum is σ = 28317629736. Its totient is φ = 28295256880.

The previous prime is 28306443301. The next prime is 28306443313. The reversal of 28306443307 is 70334460382.

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

It is an interprime number because it is at equal distance from previous prime (28306443301) and next prime (28306443313).

It is a cyclic number.

It is not a de Polignac number, because 28306443307 - 2¹¹ = 28306441259 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 28306443307.

It is not an unprimeable number, because it can be changed into a prime (28306443301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5589418 + ... + 5594479.

It is an arithmetic number, because the mean of its divisors is an integer number (7079407434).

Almost surely, 2^28306443307 is an apocalyptic number.

28306443307 is a deficient number, since it is larger than the sum of its proper divisors (11186429).

28306443307 is a wasteful number, since it uses less digits than its factorization.

28306443307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11186428.

The product of its (nonzero) digits is 290304, while the sum is 40.

The spelling of 28306443307 in words is "twenty-eight billion, three hundred six million, four hundred forty-three thousand, three hundred seven".