6430240 has 24 divisors (see below), whose sum is σ = 15191820. Its totient is φ = 2572032.

The previous prime is 6430231. The next prime is 6430241. The reversal of 6430240 is 420346.

It can be written as a sum of positive squares in 2 ways, for example, as 5438224 + 992016 = 2332^2 + 996^2 .

It is not an unprimeable number, because it can be changed into a prime (6430241) 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, 19935 + ... + 20254.

Almost surely, 2^6430240 is an apocalyptic number.

It is an amenable number.

6430240 is an abundant number, since it is smaller than the sum of its proper divisors (8761580).

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

6430240 is a wasteful number, since it uses less digits than its factorization.

6430240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40204 (or 40196 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 6430240 is about 2535.7917895600. The cubic root of 6430240 is about 185.9555140846.

Adding to 6430240 its reverse (420346), we get a palindrome (6850586).

It can be divided in two parts, 6430 and 240, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 6430240 in words is "six million, four hundred thirty thousand, two hundred forty".