40642618 has 8 divisors (see below), whose sum is σ = 61047360. Its totient is φ = 20293500.

The previous prime is 40642607. The next prime is 40642649. The reversal of 40642618 is 81624604.

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

It is a self number, because there is not a number n which added to its sum of digits gives 40642618.

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 in 3 ways as a sum of consecutive naturals, for example, 12028 + ... + 15031.

It is an arithmetic number, because the mean of its divisors is an integer number (7630920).

Almost surely, 2^40642618 is an apocalyptic number.

40642618 is a deficient number, since it is larger than the sum of its proper divisors (20404742).

40642618 is a wasteful number, since it uses less digits than its factorization.

40642618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27812.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 40642618 is about 6375.1563118091. The cubic root of 40642618 is about 343.8169038703.

The spelling of 40642618 in words is "forty million, six hundred forty-two thousand, six hundred eighteen".