28030507 has 2 divisors, whose sum is σ = 28030508. Its totient is φ = 28030506.

The previous prime is 28030493. The next prime is 28030531. The reversal of 28030507 is 70503082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28030507 - 2²³ = 19641899 is a prime.

It is not a weakly prime, because it can be changed into another prime (28030547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14015253 + 14015254.

It is an arithmetic number, because the mean of its divisors is an integer number (14015254).

Almost surely, 2^28030507 is an apocalyptic number.

28030507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28030507 is an equidigital number, since it uses as much as digits as its factorization.

28030507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 28030507 is about 5294.3844779162. The cubic root of 28030507 is about 303.7691395641.

Adding to 28030507 its reverse (70503082), we get a palindrome (98533589).

The spelling of 28030507 in words is "twenty-eight million, thirty thousand, five hundred seven".