42144238 has 8 divisors (see below), whose sum is σ = 63252288. Its totient is φ = 21060144.

The previous prime is 42144233. The next prime is 42144247. The reversal of 42144238 is 83244124.

It is a happy number.

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

It is a super-2 number, since 2×42144238² = 3552273593201288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42144233) 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, 631 + ... + 9202.

It is an arithmetic number, because the mean of its divisors is an integer number (7906536).

Almost surely, 2^42144238 is an apocalyptic number.

42144238 is a deficient number, since it is larger than the sum of its proper divisors (21108050).

42144238 is a wasteful number, since it uses less digits than its factorization.

42144238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11978.

The product of its digits is 6144, while the sum is 28.

The square root of 42144238 is about 6491.8593638495. The cubic root of 42144238 is about 348.0001266129. Note that the first 3 decimals are identical.

The spelling of 42144238 in words is "forty-two million, one hundred forty-four thousand, two hundred thirty-eight".