218609898 has 32 divisors (see below), whose sum is σ = 472046400. Its totient is φ = 67094016.

The previous prime is 218609879. The next prime is 218609903. The reversal of 218609898 is 898906812.

It is a self number, because there is not a number n which added to its sum of digits gives 218609898.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29338 + ... + 36026.

It is an arithmetic number, because the mean of its divisors is an integer number (14751450).

Almost surely, 2^218609898 is an apocalyptic number.

218609898 is an abundant number, since it is smaller than the sum of its proper divisors (253436502).

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

218609898 is a wasteful number, since it uses less digits than its factorization.

218609898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7126.

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 218609898 is about 14785.4623870882. The cubic root of 218609898 is about 602.4069040000.

The spelling of 218609898 in words is "two hundred eighteen million, six hundred nine thousand, eight hundred ninety-eight".