40452218 has 4 divisors (see below), whose sum is σ = 60678330. Its totient is φ = 20226108.

The previous prime is 40452169. The next prime is 40452227. The reversal of 40452218 is 81225404.

It is a happy number.

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., 25836889 + 14615329 = 5083^2 + 3823^2 .

It is a super-2 number, since 2×40452218² = 3272763882239048, which contains 22 as substring.

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, 10113053 + ... + 10113056.

Almost surely, 2^40452218 is an apocalyptic number.

40452218 is a deficient number, since it is larger than the sum of its proper divisors (20226112).

40452218 is a wasteful number, since it uses less digits than its factorization.

40452218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20226111.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 40452218 is about 6360.2058142799. The cubic root of 40452218 is about 343.2791659500.

The spelling of 40452218 in words is "forty million, four hundred fifty-two thousand, two hundred eighteen".