40669418 has 4 divisors (see below), whose sum is σ = 61004130. Its totient is φ = 20334708.

The previous prime is 40669403. The next prime is 40669459. The reversal of 40669418 is 81496604.

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

It can be written as a sum of positive squares in only one way, i.e., 40615129 + 54289 = 6373^2 + 233^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167353 + ... + 10167356.

Almost surely, 2^40669418 is an apocalyptic number.

40669418 is a deficient number, since it is larger than the sum of its proper divisors (20334712).

40669418 is a wasteful number, since it uses less digits than its factorization.

40669418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20334711.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 40669418 is about 6377.2578746668. The cubic root of 40669418 is about 343.8924589476.

The spelling of 40669418 in words is "forty million, six hundred sixty-nine thousand, four hundred eighteen".