218889346 has 16 divisors (see below), whose sum is σ = 354211704. Its totient is φ = 100848384.

The previous prime is 218889337. The next prime is 218889383. The reversal of 218889346 is 643988812.

218889346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 211266225 + 7623121 = 14535^2 + 2761^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 218889346.

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, 8320 + ... + 22516.

Almost surely, 2^218889346 is an apocalyptic number.

218889346 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

218889346 is a deficient number, since it is larger than the sum of its proper divisors (135322358).

218889346 is a wasteful number, since it uses less digits than its factorization.

218889346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14805.

The product of its digits is 663552, while the sum is 49.

The square root of 218889346 is about 14794.9094623793. The cubic root of 218889346 is about 602.6634793380.

The spelling of 218889346 in words is "two hundred eighteen million, eight hundred eighty-nine thousand, three hundred forty-six".