218898964 has 12 divisors (see below), whose sum is σ = 388469088. Its totient is φ = 107907800.

The previous prime is 218898941. The next prime is 218898997. The reversal of 218898964 is 469898812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385102 + ... + 385669.

It is an arithmetic number, because the mean of its divisors is an integer number (32372424).

Almost surely, 2^218898964 is an apocalyptic number.

It is an amenable number.

218898964 is a deficient number, since it is larger than the sum of its proper divisors (169570124).

218898964 is a wasteful number, since it uses less digits than its factorization.

218898964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770846 (or 770844 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 55.

The square root of 218898964 is about 14795.2345030418. The cubic root of 218898964 is about 602.6723062218.

The spelling of 218898964 in words is "two hundred eighteen million, eight hundred ninety-eight thousand, nine hundred sixty-four".