28707007 has 8 divisors (see below), whose sum is σ = 32947200. Its totient is φ = 24501624.

The previous prime is 28706987. The next prime is 28707017. The reversal of 28707007 is 70070782.

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

It is not a de Polignac number, because 28707007 - 2⁷ = 28706879 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 28707007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28707017) 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, 6907 + ... + 10252.

It is an arithmetic number, because the mean of its divisors is an integer number (4118400).

Almost surely, 2^28707007 is an apocalyptic number.

28707007 is a deficient number, since it is larger than the sum of its proper divisors (4240193).

28707007 is a wasteful number, since it uses less digits than its factorization.

28707007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17405.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 28707007 is about 5357.8920295206. The cubic root of 28707007 is about 306.1935032808.

Adding to 28707007 its reverse (70070782), we get a palindrome (98777789).

The spelling of 28707007 in words is "twenty-eight million, seven hundred seven thousand, seven".