42229638 has 24 divisors (see below), whose sum is σ = 99815976. Its totient is φ = 12796800.

The previous prime is 42229637. The next prime is 42229639. The reversal of 42229638 is 83692224.

It is an interprime number because it is at equal distance from previous prime (42229637) and next prime (42229639).

It is a super-2 number, since 2×42229638² = 3566684651222088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42229637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106443 + ... + 106838.

It is an arithmetic number, because the mean of its divisors is an integer number (4158999).

Almost surely, 2^42229638 is an apocalyptic number.

42229638 is an abundant number, since it is smaller than the sum of its proper divisors (57586338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42229638 is a wasteful number, since it uses less digits than its factorization.

42229638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213300 (or 213297 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 42229638 is about 6498.4335035453. The cubic root of 42229638 is about 348.2350275207.

The spelling of 42229638 in words is "forty-two million, two hundred twenty-nine thousand, six hundred thirty-eight".