218426412 has 24 divisors (see below), whose sum is σ = 521515456. Its totient is φ = 71115408.

The previous prime is 218426363. The next prime is 218426419. The reversal of 218426412 is 214624812.

It is a self number, because there is not a number n which added to its sum of digits gives 218426412.

It is not an unprimeable number, because it can be changed into a prime (218426419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211138 + ... + 212169.

Almost surely, 2^218426412 is an apocalyptic number.

It is an amenable number.

218426412 is an abundant number, since it is smaller than the sum of its proper divisors (303089044).

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

218426412 is a wasteful number, since it uses less digits than its factorization.

218426412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423357 (or 423355 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 218426412 is about 14779.2561382500. The cubic root of 218426412 is about 602.2383172872.

The spelling of 218426412 in words is "two hundred eighteen million, four hundred twenty-six thousand, four hundred twelve".