4065438 has 16 divisors (see below), whose sum is σ = 8756496. Its totient is φ = 1250880.

The previous prime is 4065427. The next prime is 4065461. The reversal of 4065438 is 8345604.

4065438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×4065438² = 33055572263688, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25983 + ... + 26138.

It is an arithmetic number, because the mean of its divisors is an integer number (547281).

Almost surely, 2^4065438 is an apocalyptic number.

4065438 is an abundant number, since it is smaller than the sum of its proper divisors (4691058).

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

4065438 is a wasteful number, since it uses less digits than its factorization.

4065438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52139.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 4065438 is about 2016.2931334506. The cubic root of 4065438 is about 159.6010634284.

The spelling of 4065438 in words is "four million, sixty-five thousand, four hundred thirty-eight".