218864046 has 16 divisors (see below), whose sum is σ = 438354000. Its totient is φ = 72850368.

The previous prime is 218864033. The next prime is 218864047. The reversal of 218864046 is 640468812.

It is a junction number, because it is equal to n+sod(n) for n = 218863995 and 218864013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218864047) 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, 21471 + ... + 29978.

It is an arithmetic number, because the mean of its divisors is an integer number (27397125).

Almost surely, 2^218864046 is an apocalyptic number.

218864046 is an abundant number, since it is smaller than the sum of its proper divisors (219489954).

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

218864046 is a wasteful number, since it uses less digits than its factorization.

218864046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52163.

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 218864046 is about 14794.0544138515. The cubic root of 218864046 is about 602.6402591222.

The spelling of 218864046 in words is "two hundred eighteen million, eight hundred sixty-four thousand, forty-six".