40818839 has 2 divisors, whose sum is σ = 40818840. Its totient is φ = 40818838.

The previous prime is 40818829. The next prime is 40818857. The reversal of 40818839 is 93881804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40818839 - 2²⁴ = 24041623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40818796 and 40818805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40818829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20409419 + 20409420.

It is an arithmetic number, because the mean of its divisors is an integer number (20409420).

Almost surely, 2^40818839 is an apocalyptic number.

40818839 is a deficient number, since it is larger than the sum of its proper divisors (1).

40818839 is an equidigital number, since it uses as much as digits as its factorization.

40818839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 40818839 is about 6388.9622788055. The cubic root of 40818839 is about 344.3131022378.

The spelling of 40818839 in words is "forty million, eight hundred eighteen thousand, eight hundred thirty-nine".