28196001 has 12 divisors (see below), whose sum is σ = 41186340. Its totient is φ = 18585600.

The previous prime is 28195997. The next prime is 28196023. The reversal of 28196001 is 10069182.

It can be written as a sum of positive squares in 2 ways, for example, as 10556001 + 17640000 = 3249^2 + 4200^2 .

It is not a de Polignac number, because 28196001 - 2² = 28195997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28196401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16800 + ... + 18401.

It is an arithmetic number, because the mean of its divisors is an integer number (3432195).

Almost surely, 2^28196001 is an apocalyptic number.

It is an amenable number.

28196001 is a deficient number, since it is larger than the sum of its proper divisors (12990339).

28196001 is a wasteful number, since it uses less digits than its factorization.

28196001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35296 (or 35293 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 28196001 is about 5309.9906779579. The cubic root of 28196001 is about 304.3657913580.

The spelling of 28196001 in words is "twenty-eight million, one hundred ninety-six thousand, one".