28230007 has 16 divisors (see below), whose sum is σ = 31303552. Its totient is φ = 25297920.

The previous prime is 28229989. The next prime is 28230011. The reversal of 28230007 is 70003282.

It is a happy number.

It is not a de Polignac number, because 28230007 - 2⁷ = 28229879 is a prime.

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 28230007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28230607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76738 + ... + 77104.

It is an arithmetic number, because the mean of its divisors is an integer number (1956472).

Almost surely, 2^28230007 is an apocalyptic number.

28230007 is a deficient number, since it is larger than the sum of its proper divisors (3073545).

28230007 is a wasteful number, since it uses less digits than its factorization.

28230007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 28230007 is about 5313.1917902519. The cubic root of 28230007 is about 304.4881030868.

Adding to 28230007 its reverse (70003282), we get a palindrome (98233289).

The spelling of 28230007 in words is "twenty-eight million, two hundred thirty thousand, seven".