218926946 has 16 divisors (see below), whose sum is σ = 378006720. Its totient is φ = 93150000.

The previous prime is 218926931. The next prime is 218926951. The reversal of 218926946 is 649629812.

It is a self number, because there is not a number n which added to its sum of digits gives 218926946.

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, 54305 + ... + 58196.

It is an arithmetic number, because the mean of its divisors is an integer number (23625420).

Almost surely, 2^218926946 is an apocalyptic number.

218926946 is a deficient number, since it is larger than the sum of its proper divisors (159079774).

218926946 is a wasteful number, since it uses less digits than its factorization.

218926946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112649.

The product of its digits is 373248, while the sum is 47.

The square root of 218926946 is about 14796.1801151513. The cubic root of 218926946 is about 602.6979851280.

The spelling of 218926946 in words is "two hundred eighteen million, nine hundred twenty-six thousand, nine hundred forty-six".