28201269 has 8 divisors (see below), whose sum is σ = 38401920. Its totient is φ = 18400736.

The previous prime is 28201267. The next prime is 28201273. The reversal of 28201269 is 96210282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28201269 - 2¹ = 28201267 is a prime.

It is a super-2 number, since 2×28201269² = 1590623146420722, which contains 22 as substring.

28201269 is a modest number, since divided by 1269 gives 282 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28201267) 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 7 ways as a sum of consecutive naturals, for example, 99864 + ... + 100145.

It is an arithmetic number, because the mean of its divisors is an integer number (4800240).

Almost surely, 2^28201269 is an apocalyptic number.

It is an amenable number.

28201269 is a deficient number, since it is larger than the sum of its proper divisors (10200651).

28201269 is a wasteful number, since it uses less digits than its factorization.

28201269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200059.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28201269 is about 5310.4867008590. The cubic root of 28201269 is about 304.3847455724.

The spelling of 28201269 in words is "twenty-eight million, two hundred one thousand, two hundred sixty-nine".