218392468 has 12 divisors (see below), whose sum is σ = 436784992. Its totient is φ = 93596760.

The previous prime is 218392439. The next prime is 218392469. The reversal of 218392468 is 864293812.

218392468 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218392469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3899838 + ... + 3899893.

Almost surely, 2^218392468 is an apocalyptic number.

218392468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

218392468 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

218392468 is a wasteful number, since it uses less digits than its factorization.

218392468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7799742 (or 7799740 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 218392468 is about 14778.1077273107. The cubic root of 218392468 is about 602.2071192340.

The spelling of 218392468 in words is "two hundred eighteen million, three hundred ninety-two thousand, four hundred sixty-eight".