218473464 has 64 divisors (see below), whose sum is σ = 599610240. Its totient is φ = 65784960.

The previous prime is 218473439. The next prime is 218473471. The reversal of 218473464 is 464374812.

218473464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 40494 + ... + 45570.

It is an arithmetic number, because the mean of its divisors is an integer number (9368910).

Almost surely, 2^218473464 is an apocalyptic number.

218473464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218473464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299805120).

218473464 is an abundant number, since it is smaller than the sum of its proper divisors (381136776).

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

218473464 is a wasteful number, since it uses less digits than its factorization.

218473464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260 (or 5256 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 218473464 is about 14780.8478782511. The cubic root of 218473464 is about 602.2815576057.

The spelling of 218473464 in words is "two hundred eighteen million, four hundred seventy-three thousand, four hundred sixty-four".