28625307 has 12 divisors (see below), whose sum is σ = 39441960. Its totient is φ = 18466080.

The previous prime is 28625293. The next prime is 28625321. The reversal of 28625307 is 70352682.

It is an interprime number because it is at equal distance from previous prime (28625293) and next prime (28625321).

It is not a de Polignac number, because 28625307 - 2¹² = 28621211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28625327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2082 + ... + 7847.

It is an arithmetic number, because the mean of its divisors is an integer number (3286830).

Almost surely, 2^28625307 is an apocalyptic number.

28625307 is a deficient number, since it is larger than the sum of its proper divisors (10816653).

28625307 is an equidigital number, since it uses as much as digits as its factorization.

28625307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9994 (or 9963 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28625307 is about 5350.2623300171. The cubic root of 28625307 is about 305.9027522152.

Adding to 28625307 its reverse (70352682), we get a palindrome (98977989).

The spelling of 28625307 in words is "twenty-eight million, six hundred twenty-five thousand, three hundred seven".