6422439 has 8 divisors (see below), whose sum is σ = 8578672. Its totient is φ = 4273920.

The previous prime is 6422431. The next prime is 6422441. The reversal of 6422439 is 9342246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6422439 - 2³ = 6422431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6422431) 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, 429 + ... + 3609.

It is an arithmetic number, because the mean of its divisors is an integer number (1072334).

Almost surely, 2^6422439 is an apocalyptic number.

6422439 is a deficient number, since it is larger than the sum of its proper divisors (2156233).

6422439 is a wasteful number, since it uses less digits than its factorization.

6422439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857.

The product of its digits is 10368, while the sum is 30.

The square root of 6422439 is about 2534.2531444195. The cubic root of 6422439 is about 185.8802848558.

It can be divided in two parts, 642 and 2439, that added together give a triangular number (3081 = T₇₈).

The spelling of 6422439 in words is "six million, four hundred twenty-two thousand, four hundred thirty-nine".