38405447 has 2 divisors, whose sum is σ = 38405448. Its totient is φ = 38405446.

The previous prime is 38405333. The next prime is 38405453. The reversal of 38405447 is 74450483.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38405447 - 2¹⁰ = 38404423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38402447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19202723 + 19202724.

It is an arithmetic number, because the mean of its divisors is an integer number (19202724).

Almost surely, 2^38405447 is an apocalyptic number.

38405447 is a deficient number, since it is larger than the sum of its proper divisors (1).

38405447 is an equidigital number, since it uses as much as digits as its factorization.

38405447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 38405447 is about 6197.2128412699. The cubic root of 38405447 is about 337.3890173725.

The spelling of 38405447 in words is "thirty-eight million, four hundred five thousand, four hundred forty-seven".