42238369 has 4 divisors (see below), whose sum is σ = 42251440. Its totient is φ = 42225300.

The previous prime is 42238367. The next prime is 42238381. The reversal of 42238369 is 96383224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42238369 - 2¹ = 42238367 is a prime.

It is a super-2 number, since 2×42238369² = 3568159631560322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42238367) 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, 2242 + ... + 9460.

It is an arithmetic number, because the mean of its divisors is an integer number (10562860).

Almost surely, 2^42238369 is an apocalyptic number.

It is an amenable number.

42238369 is a deficient number, since it is larger than the sum of its proper divisors (13071).

42238369 is an equidigital number, since it uses as much as digits as its factorization.

42238369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13070.

The product of its digits is 62208, while the sum is 37.

The square root of 42238369 is about 6499.1052461089. The cubic root of 42238369 is about 348.2590251257.

The spelling of 42238369 in words is "forty-two million, two hundred thirty-eight thousand, three hundred sixty-nine".