218738046 has 32 divisors (see below), whose sum is σ = 452745216. Its totient is φ = 70380000.

The previous prime is 218738041. The next prime is 218738071. The reversal of 218738046 is 640837812.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 218737995 and 218738013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218738041) 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, 84471 + ... + 87021.

It is an arithmetic number, because the mean of its divisors is an integer number (14148288).

Almost surely, 2^218738046 is an apocalyptic number.

218738046 is an abundant number, since it is smaller than the sum of its proper divisors (234007170).

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

218738046 is a wasteful number, since it uses less digits than its factorization.

218738046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 218738046 is about 14789.7953332695. The cubic root of 218738046 is about 602.5245902855.

The spelling of 218738046 in words is "two hundred eighteen million, seven hundred thirty-eight thousand, forty-six".