6240240 has 140 divisors (see below), whose sum is σ = 21956184. Its totient is φ = 1648512.

The previous prime is 6240233. The next prime is 6240251. The reversal of 6240240 is 420426.

6240240 = 426² + 427² + ... + 457².

6240240 is a `hidden beast` number, since 624 + 0 + 2 + 40 = 666.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 58267 + ... + 58373.

Almost surely, 2^6240240 is an apocalyptic number.

6240240 is a gapful number since it is divisible by the number (60) 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 6240240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10978092).

6240240 is an abundant number, since it is smaller than the sum of its proper divisors (15715944).

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

6240240 is a wasteful number, since it uses less digits than its factorization.

6240240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 6240240 is about 2498.0472373436. The cubic root of 6240240 is about 184.1056419185.

Adding to 6240240 its reverse (420426), we get a palindrome (6660666).

The spelling of 6240240 in words is "six million, two hundred forty thousand, two hundred forty".