218790412 has 12 divisors (see below), whose sum is σ = 383840856. Its totient is φ = 109121600.

The previous prime is 218790409. The next prime is 218790427. The reversal of 218790412 is 214097812.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66598 + ... + 69805.

It is an arithmetic number, because the mean of its divisors is an integer number (31986738).

Almost surely, 2^218790412 is an apocalyptic number.

It is an amenable number.

218790412 is a deficient number, since it is larger than the sum of its proper divisors (165050444).

218790412 is a wasteful number, since it uses less digits than its factorization.

218790412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136808 (or 136806 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 218790412 is about 14791.5655696076. The cubic root of 218790412 is about 602.5726680141.

The spelling of 218790412 in words is "two hundred eighteen million, seven hundred ninety thousand, four hundred twelve".