2478439 has 8 divisors (see below), whose sum is σ = 2555712. Its totient is φ = 2402400.

The previous prime is 2478407. The next prime is 2478449. The reversal of 2478439 is 9348742.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2478439 - 2⁵ = 2478407 is a prime.

It is a super-2 number, since 2×2478439² = 12285319753442, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁵ + 4 + 7⁶ + 8⁷ + 4⁹ + 3⁶ + 9³ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2478398 and 2478407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478449) 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, 5122 + ... + 5584.

It is an arithmetic number, because the mean of its divisors is an integer number (319464).

2^2478439 is an apocalyptic number.

2478439 is a deficient number, since it is larger than the sum of its proper divisors (77273).

2478439 is a wasteful number, since it uses less digits than its factorization.

2478439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its digits is 48384, while the sum is 37.

The square root of 2478439 is about 1574.3058787923. The cubic root of 2478439 is about 135.3295833744.

The spelling of 2478439 in words is "two million, four hundred seventy-eight thousand, four hundred thirty-nine".