28057730507 has 2 divisors, whose sum is σ = 28057730508. Its totient is φ = 28057730506.

The previous prime is 28057730497. The next prime is 28057730527. The reversal of 28057730507 is 70503775082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28057730507 - 2¹⁴ = 28057714123 is a prime.

It is not a weakly prime, because it can be changed into another prime (28057730527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028865253 + 14028865254.

It is an arithmetic number, because the mean of its divisors is an integer number (14028865254).

Almost surely, 2^28057730507 is an apocalyptic number.

28057730507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057730507 is an equidigital number, since it uses as much as digits as its factorization.

28057730507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 411600, while the sum is 44.

The spelling of 28057730507 in words is "twenty-eight billion, fifty-seven million, seven hundred thirty thousand, five hundred seven".