40768439 has 2 divisors, whose sum is σ = 40768440. Its totient is φ = 40768438.

The previous prime is 40768423. The next prime is 40768447. The reversal of 40768439 is 93486704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40768439 - 2⁴ = 40768423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40768396 and 40768405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40768459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20384219 + 20384220.

It is an arithmetic number, because the mean of its divisors is an integer number (20384220).

Almost surely, 2^40768439 is an apocalyptic number.

40768439 is a deficient number, since it is larger than the sum of its proper divisors (1).

40768439 is an equidigital number, since it uses as much as digits as its factorization.

40768439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 40768439 is about 6385.0167580046. The cubic root of 40768439 is about 344.1713333235.

The spelling of 40768439 in words is "forty million, seven hundred sixty-eight thousand, four hundred thirty-nine".