40247986 has 8 divisors (see below), whose sum is σ = 60461424. Its totient is φ = 20094180.

The previous prime is 40247981. The next prime is 40247989. The reversal of 40247986 is 68974204.

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

It is not an unprimeable number, because it can be changed into a prime (40247981) 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 3 ways as a sum of consecutive naturals, for example, 13180 + ... + 15943.

It is an arithmetic number, because the mean of its divisors is an integer number (7557678).

Almost surely, 2^40247986 is an apocalyptic number.

40247986 is a deficient number, since it is larger than the sum of its proper divisors (20213438).

40247986 is a wasteful number, since it uses less digits than its factorization.

40247986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29816.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 40247986 is about 6344.1300428033. The cubic root of 40247986 is about 342.7004839691.

The spelling of 40247986 in words is "forty million, two hundred forty-seven thousand, nine hundred eighty-six".