218985948 has 18 divisors (see below), whose sum is σ = 553547904. Its totient is φ = 72995304.

The previous prime is 218985947. The next prime is 218985979. The reversal of 218985948 is 849589812.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 218985894 and 218985903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218985947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3041436 + ... + 3041507.

Almost surely, 2^218985948 is an apocalyptic number.

It is an amenable number.

218985948 is an abundant number, since it is smaller than the sum of its proper divisors (334561956).

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

218985948 is a wasteful number, since it uses less digits than its factorization.

218985948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082953 (or 6082948 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 218985948 is about 14798.1738062506. The cubic root of 218985948 is about 602.7521237240.

The spelling of 218985948 in words is "two hundred eighteen million, nine hundred eighty-five thousand, nine hundred forty-eight".