40685723 has 8 divisors (see below), whose sum is σ = 44060016. Its totient is φ = 37346400.

The previous prime is 40685713. The next prime is 40685731. The reversal of 40685723 is 32758604.

It is a happy number.

40685723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40685723 - 2⁸ = 40685467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40685713) 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 in 7 ways as a sum of consecutive naturals, for example, 6293 + ... + 10998.

It is an arithmetic number, because the mean of its divisors is an integer number (5507502).

Almost surely, 2^40685723 is an apocalyptic number.

40685723 is a deficient number, since it is larger than the sum of its proper divisors (3374293).

40685723 is a wasteful number, since it uses less digits than its factorization.

40685723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17485.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 40685723 is about 6378.5361173235. The cubic root of 40685723 is about 343.9384100796.

The spelling of 40685723 in words is "forty million, six hundred eighty-five thousand, seven hundred twenty-three".