8430240 has 192 divisors, whose sum is σ = 32852736. Its totient is φ = 1769472.

The previous prime is 8430217. The next prime is 8430251. The reversal of 8430240 is 420348.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43584 + ... + 43776.

It is an arithmetic number, because the mean of its divisors is an integer number (171108).

Almost surely, 2^8430240 is an apocalyptic number.

8430240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8430240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16426368).

8430240 is an abundant number, since it is smaller than the sum of its proper divisors (24422496).

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

8430240 is a wasteful number, since it uses less digits than its factorization.

8430240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 8430240 is about 2903.4875580929. The cubic root of 8430240 is about 203.5229143505.

Adding to 8430240 its reverse (420348), we get a palindrome (8850588).

The spelling of 8430240 in words is "eight million, four hundred thirty thousand, two hundred forty".