38447728019 has 2 divisors, whose sum is σ = 38447728020. Its totient is φ = 38447728018.

The previous prime is 38447728009. The next prime is 38447728031. The reversal of 38447728019 is 91082774483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38447728019 - 2⁸ = 38447727763 is a prime.

It is a super-2 number, since 2×38447728019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38447728009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19223864009 + 19223864010.

It is an arithmetic number, because the mean of its divisors is an integer number (19223864010).

Almost surely, 2^38447728019 is an apocalyptic number.

38447728019 is a deficient number, since it is larger than the sum of its proper divisors (1).

38447728019 is an equidigital number, since it uses as much as digits as its factorization.

38447728019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 38447728019 in words is "thirty-eight billion, four hundred forty-seven million, seven hundred twenty-eight thousand, nineteen".