218730996 has 48 divisors (see below), whose sum is σ = 618636480. Its totient is φ = 66281760.

The previous prime is 218730991. The next prime is 218731001. The reversal of 218730996 is 699037812.

It is an interprime number because it is at equal distance from previous prime (218730991) and next prime (218731001).

It is a super-2 number, since 2×218730996² = 95686497222304032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218730991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90871 + ... + 93246.

It is an arithmetic number, because the mean of its divisors is an integer number (12888260).

Almost surely, 2^218730996 is an apocalyptic number.

It is an amenable number.

218730996 is an abundant number, since it is smaller than the sum of its proper divisors (399905484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218730996 is a wasteful number, since it uses less digits than its factorization.

218730996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184141 (or 184133 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 218730996 is about 14789.5569913368. The cubic root of 218730996 is about 602.5181170267.

The spelling of 218730996 in words is "two hundred eighteen million, seven hundred thirty thousand, nine hundred ninety-six".