38439811 has 2 divisors, whose sum is σ = 38439812. Its totient is φ = 38439810.

The previous prime is 38439773. The next prime is 38439823. The reversal of 38439811 is 11893483.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38439811 - 2¹⁵ = 38407043 is a prime.

It is not a weakly prime, because it can be changed into another prime (38439851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19219905 + 19219906.

It is an arithmetic number, because the mean of its divisors is an integer number (19219906).

Almost surely, 2^38439811 is an apocalyptic number.

38439811 is a deficient number, since it is larger than the sum of its proper divisors (1).

38439811 is an equidigital number, since it uses as much as digits as its factorization.

38439811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 38439811 is about 6199.9847580458. The cubic root of 38439811 is about 337.4896157756.

The spelling of 38439811 in words is "thirty-eight million, four hundred thirty-nine thousand, eight hundred eleven".