218029648 has 20 divisors (see below), whose sum is σ = 426311380. Its totient is φ = 108013824.

The previous prime is 218029639. The next prime is 218029649. The reversal of 218029648 is 846920812.

It can be written as a sum of positive squares in 2 ways, for example, as 70358544 + 147671104 = 8388^2 + 12152^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 218029648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218029649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60765 + ... + 64252.

It is an arithmetic number, because the mean of its divisors is an integer number (21315569).

Almost surely, 2^218029648 is an apocalyptic number.

It is an amenable number.

218029648 is a deficient number, since it is larger than the sum of its proper divisors (208281732).

218029648 is a wasteful number, since it uses less digits than its factorization.

218029648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125134 (or 125128 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 218029648 is about 14765.8270340675. The cubic root of 218029648 is about 601.8734479367.

The spelling of 218029648 in words is "two hundred eighteen million, twenty-nine thousand, six hundred forty-eight".