218986146 has 32 divisors (see below), whose sum is σ = 515263680. Its totient is φ = 68701248.

The previous prime is 218986087. The next prime is 218986147. The reversal of 218986146 is 641689812.

218986146 is a `hidden beast` number, since 21 + 8 + 9 + 8 + 614 + 6 = 666.

218986146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (218986147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118356 + ... + 120191.

It is an arithmetic number, because the mean of its divisors is an integer number (16101990).

Almost surely, 2^218986146 is an apocalyptic number.

218986146 is an abundant number, since it is smaller than the sum of its proper divisors (296277534).

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

218986146 is a wasteful number, since it uses less digits than its factorization.

218986146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238575 (or 238569 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 218986146 is about 14798.1804962637. The cubic root of 218986146 is about 602.7523053869.

The spelling of 218986146 in words is "two hundred eighteen million, nine hundred eighty-six thousand, one hundred forty-six".