6435240 has 128 divisors (see below), whose sum is σ = 22671360. Its totient is φ = 1430784.

The previous prime is 6435179. The next prime is 6435277. The reversal of 6435240 is 425346.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 6435240.

It is a congruent number.

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, 39399 + ... + 39561.

It is an arithmetic number, because the mean of its divisors is an integer number (177120).

Almost surely, 2^6435240 is an apocalyptic number.

6435240 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 6435240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11335680).

6435240 is an abundant number, since it is smaller than the sum of its proper divisors (16236120).

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

6435240 is a wasteful number, since it uses less digits than its factorization.

6435240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 6435240 is about 2536.7774833438. Note that the first 3 decimals coincide. The cubic root of 6435240 is about 186.0036997761.

The spelling of 6435240 in words is "six million, four hundred thirty-five thousand, two hundred forty".