28022907 has 8 divisors (see below), whose sum is σ = 40760640. Its totient is φ = 16983560.

The previous prime is 28022893. The next prime is 28022921. The reversal of 28022907 is 70922082.

It is an interprime number because it is at equal distance from previous prime (28022893) and next prime (28022921).

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

It is not a de Polignac number, because 28022907 - 2⁸ = 28022651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28022927) 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, 424557 + ... + 424622.

It is an arithmetic number, because the mean of its divisors is an integer number (5095080).

Almost surely, 2^28022907 is an apocalyptic number.

28022907 is a deficient number, since it is larger than the sum of its proper divisors (12737733).

28022907 is a wasteful number, since it uses less digits than its factorization.

28022907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849193.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 28022907 is about 5293.6666876561. Note that the first 4 decimals coincide. The cubic root of 28022907 is about 303.7416831200.

Adding to 28022907 its reverse (70922082), we get a palindrome (98944989).

The spelling of 28022907 in words is "twenty-eight million, twenty-two thousand, nine hundred seven".