42238442 has 16 divisors (see below), whose sum is σ = 68394240. Its totient is φ = 19503792.

The previous prime is 42238439. The next prime is 42238447. The reversal of 42238442 is 24483224.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (42238447) 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, 14498 + ... + 17165.

It is an arithmetic number, because the mean of its divisors is an integer number (4274640).

Almost surely, 2^42238442 is an apocalyptic number.

42238442 is a deficient number, since it is larger than the sum of its proper divisors (26155798).

42238442 is a wasteful number, since it uses less digits than its factorization.

42238442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31717.

The product of its digits is 12288, while the sum is 29.

The square root of 42238442 is about 6499.1108622642. The cubic root of 42238442 is about 348.2592257560.

The spelling of 42238442 in words is "forty-two million, two hundred thirty-eight thousand, four hundred forty-two".