40218466 has 4 divisors (see below), whose sum is σ = 60327702. Its totient is φ = 20109232.

The previous prime is 40218463. The next prime is 40218469. The reversal of 40218466 is 66481204.

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

It is an interprime number because it is at equal distance from previous prime (40218463) and next prime (40218469).

It can be written as a sum of positive squares in only one way, i.e., 39325441 + 893025 = 6271^2 + 945^2 .

It is not an unprimeable number, because it can be changed into a prime (40218463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054615 + ... + 10054618.

Almost surely, 2^40218466 is an apocalyptic number.

40218466 is a deficient number, since it is larger than the sum of its proper divisors (20109236).

40218466 is a wasteful number, since it uses less digits than its factorization.

40218466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20109235.

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

The square root of 40218466 is about 6341.8030559140. The cubic root of 40218466 is about 342.6166785945.

The spelling of 40218466 in words is "forty million, two hundred eighteen thousand, four hundred sixty-six".