40931686 has 4 divisors (see below), whose sum is σ = 61397532. Its totient is φ = 20465842.

The previous prime is 40931669. The next prime is 40931701. The reversal of 40931686 is 68613904.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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, 10232920 + ... + 10232923.

It is an arithmetic number, because the mean of its divisors is an integer number (15349383).

Almost surely, 2^40931686 is an apocalyptic number.

40931686 is a deficient number, since it is larger than the sum of its proper divisors (20465846).

40931686 is a wasteful number, since it uses less digits than its factorization.

40931686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20465845.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 40931686 is about 6397.7875863458. The cubic root of 40931686 is about 344.6301041486.

The spelling of 40931686 in words is "forty million, nine hundred thirty-one thousand, six hundred eighty-six".