28025307 has 6 divisors (see below), whose sum is σ = 40481012. Its totient is φ = 18683532.

The previous prime is 28025303. The next prime is 28025311. The reversal of 28025307 is 70352082.

It is an interprime number because it is at equal distance from previous prime (28025303) and next prime (28025311).

It is not a de Polignac number, because 28025307 - 2² = 28025303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28025303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1556953 + ... + 1556970.

Almost surely, 2^28025307 is an apocalyptic number.

28025307 is a deficient number, since it is larger than the sum of its proper divisors (12455705).

28025307 is a wasteful number, since it uses less digits than its factorization.

28025307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113929 (or 3113926 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 28025307 is about 5293.8933687788. The cubic root of 28025307 is about 303.7503541123.

Adding to 28025307 its reverse (70352082), we get a palindrome (98377389).

The spelling of 28025307 in words is "twenty-eight million, twenty-five thousand, three hundred seven".