4026439 has 4 divisors (see below), whose sum is σ = 4030456. Its totient is φ = 4022424.

The previous prime is 4026437. The next prime is 4026469. The reversal of 4026439 is 9346204.

It is a semiprime because it is the product of two primes, 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 4026439 - 2¹ = 4026437 is a prime.

It is a super-2 number, since 2×4026439² = 32424422041442, which contains 22 as substring.

It is a Duffinian number.

4026439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4026437) 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, 892 + ... + 2974.

It is an arithmetic number, because the mean of its divisors is an integer number (1007614).

Almost surely, 2^4026439 is an apocalyptic number.

4026439 is a deficient number, since it is larger than the sum of its proper divisors (4017).

4026439 is a wasteful number, since it uses less digits than its factorization.

4026439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 4026439 is about 2006.5988637493. The cubic root of 4026439 is about 159.0890815770.

It can be divided in two parts, 4026 and 439, that added together give a triangular number (4465 = T₉₄).

The spelling of 4026439 in words is "four million, twenty-six thousand, four hundred thirty-nine".