28000007 has 8 divisors (see below), whose sum is σ = 32780832. Its totient is φ = 23414400.

The previous prime is 27999943. The next prime is 28000019. The reversal of 28000007 is 70000082.

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 28000007 - 2⁶ = 27999943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000087) 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, 48494 + ... + 49067.

It is an arithmetic number, because the mean of its divisors is an integer number (4097604).

Almost surely, 2^28000007 is an apocalyptic number.

28000007 is a deficient number, since it is larger than the sum of its proper divisors (4780825).

28000007 is an equidigital number, since it uses as much as digits as its factorization.

28000007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97609.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 28000007 is about 5291.5032835670. The cubic root of 28000007 is about 303.6589224925.

Adding to 28000007 its reverse (70000082), we get a palindrome (98000089).

The spelling of 28000007 in words is "twenty-eight million, seven", and thus it is an aban number and an uban number.