28271207 has 8 divisors (see below), whose sum is σ = 29296080. Its totient is φ = 27264640.

The previous prime is 28271203. The next prime is 28271231. The reversal of 28271207 is 70217282.

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 28271207 - 2² = 28271203 is a prime.

It is a super-2 number, since 2×28271207² = 1598522290473698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28271207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28271203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1394 + ... + 7647.

It is an arithmetic number, because the mean of its divisors is an integer number (3662010).

Almost surely, 2^28271207 is an apocalyptic number.

28271207 is a deficient number, since it is larger than the sum of its proper divisors (1024873).

28271207 is an equidigital number, since it uses as much as digits as its factorization.

28271207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9153.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 28271207 is about 5317.0675188491. The cubic root of 28271207 is about 304.6361584515.

Adding to 28271207 its reverse (70217282), we get a palindrome (98488489).

The spelling of 28271207 in words is "twenty-eight million, two hundred seventy-one thousand, two hundred seven".