28268328007 has 4 divisors (see below), whose sum is σ = 28585949760. Its totient is φ = 27950706256.

The previous prime is 28268327939. The next prime is 28268328017. The reversal of 28268328007 is 70082386282.

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 28268328007 - 2¹⁵ = 28268295239 is a prime.

It is a super-2 number, since 2×28268328007² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268328017) 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, 158810743 + ... + 158810920.

It is an arithmetic number, because the mean of its divisors is an integer number (7146487440).

Almost surely, 2^28268328007 is an apocalyptic number.

28268328007 is a deficient number, since it is larger than the sum of its proper divisors (317621753).

28268328007 is an equidigital number, since it uses as much as digits as its factorization.

28268328007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317621752.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 28268328007 in words is "twenty-eight billion, two hundred sixty-eight million, three hundred twenty-eight thousand, seven".