39728346787 has 2 divisors, whose sum is σ = 39728346788. Its totient is φ = 39728346786.

The previous prime is 39728346781. The next prime is 39728346841. The reversal of 39728346787 is 78764382793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39728346787 - 2¹⁹ = 39727822499 is a prime.

It is not a weakly prime, because it can be changed into another prime (39728346781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19864173393 + 19864173394.

It is an arithmetic number, because the mean of its divisors is an integer number (19864173394).

Almost surely, 2^39728346787 is an apocalyptic number.

39728346787 is a deficient number, since it is larger than the sum of its proper divisors (1).

39728346787 is an equidigital number, since it uses as much as digits as its factorization.

39728346787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85349376, while the sum is 64.

The spelling of 39728346787 in words is "thirty-nine billion, seven hundred twenty-eight million, three hundred forty-six thousand, seven hundred eighty-seven".