28006007 has 4 divisors (see below), whose sum is σ = 28071120. Its totient is φ = 27940896.

The previous prime is 28006001. The next prime is 28006039. The reversal of 28006007 is 70060082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28006007 - 2¹⁰ = 28004983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28006001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31907 + ... + 32772.

It is an arithmetic number, because the mean of its divisors is an integer number (7017780).

Almost surely, 2^28006007 is an apocalyptic number.

28006007 is a deficient number, since it is larger than the sum of its proper divisors (65113).

28006007 is an equidigital number, since it uses as much as digits as its factorization.

28006007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65112.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 28006007 is about 5292.0701998367. The cubic root of 28006007 is about 303.6806108610.

Adding to 28006007 its reverse (70060082), we get a palindrome (98066089).

The spelling of 28006007 in words is "twenty-eight million, six thousand, seven".