218439046 has 16 divisors (see below), whose sum is σ = 384588576. Its totient is φ = 91086336.

The previous prime is 218439043. The next prime is 218439047. The reversal of 218439046 is 640934812.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 218438996 and 218439014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218439043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210331 + ... + 211366.

It is an arithmetic number, because the mean of its divisors is an integer number (24036786).

Almost surely, 2^218439046 is an apocalyptic number.

218439046 is a deficient number, since it is larger than the sum of its proper divisors (166149530).

218439046 is a wasteful number, since it uses less digits than its factorization.

218439046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421743.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 218439046 is about 14779.6835554757. The cubic root of 218439046 is about 602.2499284169.

The spelling of 218439046 in words is "two hundred eighteen million, four hundred thirty-nine thousand, forty-six".