28485307 has 4 divisors (see below), whose sum is σ = 29147800. Its totient is φ = 27822816.

The previous prime is 28485277. The next prime is 28485329. The reversal of 28485307 is 70358482.

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 28485307 - 2⁷ = 28485179 is a prime.

It is a super-2 number, since 2×28485307² = 1622825429768498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28485397) 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, 331182 + ... + 331267.

It is an arithmetic number, because the mean of its divisors is an integer number (7286950).

Almost surely, 2^28485307 is an apocalyptic number.

28485307 is a deficient number, since it is larger than the sum of its proper divisors (662493).

28485307 is an equidigital number, since it uses as much as digits as its factorization.

28485307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662492.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28485307 is about 5337.1628230737. The cubic root of 28485307 is about 305.4032362480.

The spelling of 28485307 in words is "twenty-eight million, four hundred eighty-five thousand, three hundred seven".