38402218 has 8 divisors (see below), whose sum is σ = 60991812. Its totient is φ = 18071616.

The previous prime is 38402213. The next prime is 38402239. The reversal of 38402218 is 81220483.

38402218 is digitally balanced in base 2, 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 34187409 + 4214809 = 5847^2 + 2053^2 .

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

It is not an unprimeable number, because it can be changed into a prime (38402213) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 564705 + ... + 564772.

Almost surely, 2^38402218 is an apocalyptic number.

38402218 is a deficient number, since it is larger than the sum of its proper divisors (22589594).

38402218 is a wasteful number, since it uses less digits than its factorization.

38402218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129496.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 38402218 is about 6196.9523154531. The cubic root of 38402218 is about 337.3795615986.

The spelling of 38402218 in words is "thirty-eight million, four hundred two thousand, two hundred eighteen".