218692040 has 32 divisors (see below), whose sum is σ = 562351680. Its totient is φ = 74980032.

The previous prime is 218692037. The next prime is 218692049. The reversal of 218692040 is 40296812.

It is a junction number, because it is equal to n+sod(n) for n = 218691988 and 218692006.

It is not an unprimeable number, because it can be changed into a prime (218692049) by changing a digit.

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, 390242 + ... + 390801.

It is an arithmetic number, because the mean of its divisors is an integer number (17573490).

Almost surely, 2^218692040 is an apocalyptic number.

218692040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218692040 is an abundant number, since it is smaller than the sum of its proper divisors (343659640).

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

218692040 is a wasteful number, since it uses less digits than its factorization.

218692040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781061 (or 781057 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 218692040 is about 14788.2399223167. The cubic root of 218692040 is about 602.4823454019.

The spelling of 218692040 in words is "two hundred eighteen million, six hundred ninety-two thousand, forty".