28320641107 has 16 divisors (see below), whose sum is σ = 31536076032. Its totient is φ = 25213799520.

The previous prime is 28320641081. The next prime is 28320641117. The reversal of 28320641107 is 70114602382.

It is a cyclic number.

It is not a de Polignac number, because 28320641107 - 2⁷ = 28320640979 is a prime.

It is a super-2 number, since 2×28320641107² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28320641117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274498 + ... + 363304.

It is an arithmetic number, because the mean of its divisors is an integer number (1971004752).

Almost surely, 2^28320641107 is an apocalyptic number.

28320641107 is a deficient number, since it is larger than the sum of its proper divisors (3215434925).

28320641107 is a wasteful number, since it uses less digits than its factorization.

28320641107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89418.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 28320641107 in words is "twenty-eight billion, three hundred twenty million, six hundred forty-one thousand, one hundred seven".