218041444 has 24 divisors (see below), whose sum is σ = 401454648. Its totient is φ = 103484160.

The previous prime is 218041429. The next prime is 218041457. The reversal of 218041444 is 444140812.

It can be written as a sum of positive squares in 4 ways, for example, as 40832100 + 177209344 = 6390^2 + 13312^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11899 + ... + 24034.

It is an arithmetic number, because the mean of its divisors is an integer number (16727277).

Almost surely, 2^218041444 is an apocalyptic number.

It is an amenable number.

218041444 is a deficient number, since it is larger than the sum of its proper divisors (183413204).

218041444 is a wasteful number, since it uses less digits than its factorization.

218041444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36015 (or 36013 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 218041444 is about 14766.2264644695. The cubic root of 218041444 is about 601.8843020739.

The spelling of 218041444 in words is "two hundred eighteen million, forty-one thousand, four hundred forty-four".