218880944 has 20 divisors (see below), whose sum is σ = 427425024. Its totient is φ = 108577728.

The previous prime is 218880943. The next prime is 218880979. The reversal of 218880944 is 449088812.

It is a happy number.

It is a super-2 number, since 2×218880944² = 95817735292662272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218880895 and 218880904.

It is not an unprimeable number, because it can be changed into a prime (218880943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51827 + ... + 55890.

Almost surely, 2^218880944 is an apocalyptic number.

It is an amenable number.

218880944 is a deficient number, since it is larger than the sum of its proper divisors (208544080).

218880944 is a wasteful number, since it uses less digits than its factorization.

218880944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107852 (or 107846 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 218880944 is about 14794.6255106373. The cubic root of 218880944 is about 602.6557682221.

The spelling of 218880944 in words is "two hundred eighteen million, eight hundred eighty thousand, nine hundred forty-four".