28643328001 has 32 divisors (see below), whose sum is σ = 32249226240. Its totient is φ = 25308448704.

The previous prime is 28643327981. The next prime is 28643328023. The reversal of 28643328001 is 10082334682.

It is a de Polignac number, because none of the positive numbers 2^k-28643328001 is a prime.

It is a super-4 number, since 4×28643328001⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28643328031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16027830 + ... + 16029616.

It is an arithmetic number, because the mean of its divisors is an integer number (1007788320).

Almost surely, 2^28643328001 is an apocalyptic number.

It is an amenable number.

28643328001 is a deficient number, since it is larger than the sum of its proper divisors (3605898239).

28643328001 is a wasteful number, since it uses less digits than its factorization.

28643328001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 28643328001 in words is "twenty-eight billion, six hundred forty-three million, three hundred twenty-eight thousand, one".