28448707 has 8 divisors (see below), whose sum is σ = 32587616. Its totient is φ = 24328512.

The previous prime is 28448699. The next prime is 28448741. The reversal of 28448707 is 70784482.

It is a happy number.

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 28448707 - 2³ = 28448699 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 28448707.

It is not an unprimeable number, because it can be changed into a prime (28448107) 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, 1248 + ... + 7645.

It is an arithmetic number, because the mean of its divisors is an integer number (4073452).

Almost surely, 2^28448707 is an apocalyptic number.

28448707 is a deficient number, since it is larger than the sum of its proper divisors (4138909).

28448707 is an equidigital number, since it uses as much as digits as its factorization.

28448707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9357.

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 28448707 is about 5333.7329329467. The cubic root of 28448707 is about 305.2723787361.

The spelling of 28448707 in words is "twenty-eight million, four hundred forty-eight thousand, seven hundred seven".