40685732 has 6 divisors (see below), whose sum is σ = 71200038. Its totient is φ = 20342864.

The previous prime is 40685731. The next prime is 40685737. The reversal of 40685732 is 23758604.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 35331136 + 5354596 = 5944^2 + 2314^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40685692 and 40685701.

It is not an unprimeable number, because it can be changed into a prime (40685731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5085713 + ... + 5085720.

It is an arithmetic number, because the mean of its divisors is an integer number (11866673).

Almost surely, 2^40685732 is an apocalyptic number.

It is an amenable number.

40685732 is a deficient number, since it is larger than the sum of its proper divisors (30514306).

40685732 is a wasteful number, since it uses less digits than its factorization.

40685732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10171437 (or 10171435 counting only the distinct ones).

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

The square root of 40685732 is about 6378.5368228145. The cubic root of 40685732 is about 343.9384354402.

The spelling of 40685732 in words is "forty million, six hundred eighty-five thousand, seven hundred thirty-two".