63440218 has 8 divisors (see below), whose sum is σ = 95267520. Its totient is φ = 31684380.

The previous prime is 63440207. The next prime is 63440219. The reversal of 63440218 is 81204436.

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

It is a super-2 number, since 2×63440218² = 8049322519775048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63440219) 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, 15588 + ... + 19231.

It is an arithmetic number, because the mean of its divisors is an integer number (11908440).

Almost surely, 2^63440218 is an apocalyptic number.

63440218 is a deficient number, since it is larger than the sum of its proper divisors (31827302).

63440218 is a wasteful number, since it uses less digits than its factorization.

63440218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35732.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 63440218 is about 7964.9367856876. The cubic root of 63440218 is about 398.8303707521.

The spelling of 63440218 in words is "sixty-three million, four hundred forty thousand, two hundred eighteen".