28807207 has 8 divisors (see below), whose sum is σ = 33843600. Its totient is φ = 24173760.

The previous prime is 28807183. The next prime is 28807217. The reversal of 28807207 is 70270882.

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

It is a de Polignac number, because none of the positive numbers 2^k-28807207 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 (28807217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100582 + ... + 100867.

It is an arithmetic number, because the mean of its divisors is an integer number (4230450).

Almost surely, 2^28807207 is an apocalyptic number.

28807207 is a deficient number, since it is larger than the sum of its proper divisors (5036393).

28807207 is a wasteful number, since it uses less digits than its factorization.

28807207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201473.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 28807207 is about 5367.2345765767. The cubic root of 28807207 is about 306.5493393068.

The spelling of 28807207 in words is "twenty-eight million, eight hundred seven thousand, two hundred seven".