218029642 has 8 divisors (see below), whose sum is σ = 327132036. Its totient is φ = 108985632.

The previous prime is 218029639. The next prime is 218029649. The reversal of 218029642 is 246920812.

218029642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 198218241 + 19811401 = 14079^2 + 4451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 218029598 and 218029607.

It is not an unprimeable number, because it can be changed into a prime (218029649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3603 + ... + 21190.

Almost surely, 2^218029642 is an apocalyptic number.

218029642 is a deficient number, since it is larger than the sum of its proper divisors (109102394).

218029642 is a wasteful number, since it uses less digits than its factorization.

218029642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29192.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 218029642 is about 14765.8268308957. The cubic root of 218029642 is about 601.8734424157.

The spelling of 218029642 in words is "two hundred eighteen million, twenty-nine thousand, six hundred forty-two".