28393304507 has 2 divisors, whose sum is σ = 28393304508. Its totient is φ = 28393304506.

The previous prime is 28393304419. The next prime is 28393304509. The reversal of 28393304507 is 70540339382.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28393304507 is a prime.

It is a super-4 number, since 4×28393304507⁴ (a number of 43 digits) contains 4444 as substring.

Together with 28393304509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28393304509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14196652253 + 14196652254.

It is an arithmetic number, because the mean of its divisors is an integer number (14196652254).

Almost surely, 2^28393304507 is an apocalyptic number.

28393304507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28393304507 is an equidigital number, since it uses as much as digits as its factorization.

28393304507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 28393304507 in words is "twenty-eight billion, three hundred ninety-three million, three hundred four thousand, five hundred seven".