42069438 has 48 divisors (see below), whose sum is σ = 95711616. Its totient is φ = 13329360.

The previous prime is 42069431. The next prime is 42069473. The reversal of 42069438 is 83496024.

It is a happy number.

It is a super-2 number, since 2×42069438² = 3539675227271688, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42069431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126933 + ... + 127263.

It is an arithmetic number, because the mean of its divisors is an integer number (1993992).

Almost surely, 2^42069438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42069438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47855808).

42069438 is an abundant number, since it is smaller than the sum of its proper divisors (53642178).

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

42069438 is a wasteful number, since it uses less digits than its factorization.

42069438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 666 counting only the distinct ones).

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

The square root of 42069438 is about 6486.0957439742. The cubic root of 42069438 is about 347.7941211897.

The spelling of 42069438 in words is "forty-two million, sixty-nine thousand, four hundred thirty-eight".