28908235907 has 2 divisors, whose sum is σ = 28908235908. Its totient is φ = 28908235906.

The previous prime is 28908235849. The next prime is 28908235913. The reversal of 28908235907 is 70953280982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28908235907 - 2¹² = 28908231811 is a prime.

It is a super-2 number, since 2×28908235907² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28908235987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14454117953 + 14454117954.

It is an arithmetic number, because the mean of its divisors is an integer number (14454117954).

Almost surely, 2^28908235907 is an apocalyptic number.

28908235907 is a deficient number, since it is larger than the sum of its proper divisors (1).

28908235907 is an equidigital number, since it uses as much as digits as its factorization.

28908235907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 28908235907 in words is "twenty-eight billion, nine hundred eight million, two hundred thirty-five thousand, nine hundred seven".