218342480 has 80 divisors (see below), whose sum is σ = 521216640. Its totient is φ = 85034496.

The previous prime is 218342477. The next prime is 218342483. The reversal of 218342480 is 84243812.

It is an interprime number because it is at equal distance from previous prime (218342477) and next prime (218342483).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218342483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 788102 + ... + 788378.

It is an arithmetic number, because the mean of its divisors is an integer number (6515208).

Almost surely, 2^218342480 is an apocalyptic number.

218342480 is a gapful number since it is divisible by the number (20) 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 218342480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260608320).

218342480 is an abundant number, since it is smaller than the sum of its proper divisors (302874160).

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

218342480 is a wasteful number, since it uses less digits than its factorization.

218342480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 218342480 is about 14776.4163449735. The cubic root of 218342480 is about 602.1611691961.

The spelling of 218342480 in words is "two hundred eighteen million, three hundred forty-two thousand, four hundred eighty".