28988207 has 2 divisors, whose sum is σ = 28988208. Its totient is φ = 28988206.

The previous prime is 28988171. The next prime is 28988209. The reversal of 28988207 is 70288982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28988207 - 2¹⁰ = 28987183 is a prime.

It is a super-2 number, since 2×28988207² = 1680632290149698, which contains 22 as substring.

Together with 28988209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28988209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14494103 + 14494104.

It is an arithmetic number, because the mean of its divisors is an integer number (14494104).

Almost surely, 2^28988207 is an apocalyptic number.

28988207 is a deficient number, since it is larger than the sum of its proper divisors (1).

28988207 is an equidigital number, since it uses as much as digits as its factorization.

28988207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 28988207 is about 5384.0697432333. The cubic root of 28988207 is about 307.1900311379.

The spelling of 28988207 in words is "twenty-eight million, nine hundred eighty-eight thousand, two hundred seven".