218040836 has 24 divisors (see below), whose sum is σ = 411393024. Its totient is φ = 100519200.

The previous prime is 218040773. The next prime is 218040841. The reversal of 218040836 is 638040812.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58031 + ... + 61673.

It is an arithmetic number, because the mean of its divisors is an integer number (17141376).

Almost surely, 2^218040836 is an apocalyptic number.

218040836 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

218040836 is a deficient number, since it is larger than the sum of its proper divisors (193352188).

218040836 is a wasteful number, since it uses less digits than its factorization.

218040836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811 (or 4809 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 218040836 is about 14766.2058769340. The cubic root of 218040836 is about 601.8837426298.

The spelling of 218040836 in words is "two hundred eighteen million, forty thousand, eight hundred thirty-six".