40856239 has 2 divisors, whose sum is σ = 40856240. Its totient is φ = 40856238.

The previous prime is 40856227. The next prime is 40856243. The reversal of 40856239 is 93265804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40856239 - 2¹³ = 40848047 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40856198 and 40856207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40856209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20428119 + 20428120.

It is an arithmetic number, because the mean of its divisors is an integer number (20428120).

Almost surely, 2^40856239 is an apocalyptic number.

40856239 is a deficient number, since it is larger than the sum of its proper divisors (1).

40856239 is an equidigital number, since it uses as much as digits as its factorization.

40856239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 40856239 is about 6391.8885315687. Note that the first 3 decimals coincide. The cubic root of 40856239 is about 344.4182283628.

The spelling of 40856239 in words is "forty million, eight hundred fifty-six thousand, two hundred thirty-nine".