218402468 has 24 divisors (see below), whose sum is σ = 405266400. Its totient is φ = 102630528.

The previous prime is 218402447. The next prime is 218402477. The reversal of 218402468 is 864204812.

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 7 ways as a sum of consecutive naturals, for example, 56543 + ... + 60281.

It is an arithmetic number, because the mean of its divisors is an integer number (16886100).

Almost surely, 2^218402468 is an apocalyptic number.

It is an amenable number.

218402468 is a deficient number, since it is larger than the sum of its proper divisors (186863932).

218402468 is a wasteful number, since it uses less digits than its factorization.

218402468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619 (or 4617 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 218402468 is about 14778.4460617482. The cubic root of 218402468 is about 602.2163106061.

The spelling of 218402468 in words is "two hundred eighteen million, four hundred two thousand, four hundred sixty-eight".