40681323 has 12 divisors (see below), whose sum is σ = 62218728. Its totient is φ = 25525440.

The previous prime is 40681313. The next prime is 40681339. The reversal of 40681323 is 32318604.

It is a happy number.

It is not a de Polignac number, because 40681323 - 2⁹ = 40680811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40681313) 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 in 11 ways as a sum of consecutive naturals, for example, 132793 + ... + 133098.

It is an arithmetic number, because the mean of its divisors is an integer number (5184894).

Almost surely, 2^40681323 is an apocalyptic number.

40681323 is a deficient number, since it is larger than the sum of its proper divisors (21537405).

40681323 is a wasteful number, since it uses less digits than its factorization.

40681323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265914 (or 265911 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40681323 is about 6378.1912012733. The cubic root of 40681323 is about 343.9260111064.

Adding to 40681323 its reverse (32318604), we get a palindrome (72999927).

The spelling of 40681323 in words is "forty million, six hundred eighty-one thousand, three hundred twenty-three".