28768732907 has 2 divisors, whose sum is σ = 28768732908. Its totient is φ = 28768732906.

The previous prime is 28768732901. The next prime is 28768732939. The reversal of 28768732907 is 70923786782.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28768732907 - 2⁶ = 28768732843 is a prime.

It is not a weakly prime, because it can be changed into another prime (28768732901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14384366453 + 14384366454.

It is an arithmetic number, because the mean of its divisors is an integer number (14384366454).

Almost surely, 2^28768732907 is an apocalyptic number.

28768732907 is a deficient number, since it is larger than the sum of its proper divisors (1).

28768732907 is an equidigital number, since it uses as much as digits as its factorization.

28768732907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14224896, while the sum is 59.

The spelling of 28768732907 in words is "twenty-eight billion, seven hundred sixty-eight million, seven hundred thirty-two thousand, nine hundred seven".