40518686 has 16 divisors (see below), whose sum is σ = 68300064. Its totient is φ = 17887584.

The previous prime is 40518661. The next prime is 40518689. The reversal of 40518686 is 68681504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40518689) 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 in 7 ways as a sum of consecutive naturals, for example, 33281 + ... + 34476.

It is an arithmetic number, because the mean of its divisors is an integer number (4268754).

Almost surely, 2^40518686 is an apocalyptic number.

40518686 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

40518686 is a deficient number, since it is larger than the sum of its proper divisors (27781378).

40518686 is a wasteful number, since it uses less digits than its factorization.

40518686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67795.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 40518686 is about 6365.4289721903. The cubic root of 40518686 is about 343.4670797821.

It can be divided in two parts, 405 and 18686, that added together give a palindrome (19091).

The spelling of 40518686 in words is "forty million, five hundred eighteen thousand, six hundred eighty-six".