40384447 has 2 divisors, whose sum is σ = 40384448. Its totient is φ = 40384446.

The previous prime is 40384429. The next prime is 40384453. The reversal of 40384447 is 74448304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40384447 - 2⁷ = 40384319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40384417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20192223 + 20192224.

It is an arithmetic number, because the mean of its divisors is an integer number (20192224).

Almost surely, 2^40384447 is an apocalyptic number.

40384447 is a deficient number, since it is larger than the sum of its proper divisors (1).

40384447 is an equidigital number, since it uses as much as digits as its factorization.

40384447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 40384447 is about 6354.8758445779. The cubic root of 40384447 is about 343.0873563082.

The spelling of 40384447 in words is "forty million, three hundred eighty-four thousand, four hundred forty-seven".