40389407 has 2 divisors, whose sum is σ = 40389408. Its totient is φ = 40389406.

The previous prime is 40389389. The next prime is 40389413. The reversal of 40389407 is 70498304.

40389407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40389407 - 2⁶ = 40389343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40389487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20194703 + 20194704.

It is an arithmetic number, because the mean of its divisors is an integer number (20194704).

Almost surely, 2^40389407 is an apocalyptic number.

40389407 is a deficient number, since it is larger than the sum of its proper divisors (1).

40389407 is an equidigital number, since it uses as much as digits as its factorization.

40389407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 40389407 is about 6355.2660841227. The cubic root of 40389407 is about 343.1014016792.

The spelling of 40389407 in words is "forty million, three hundred eighty-nine thousand, four hundred seven".