6431340 has 48 divisors (see below), whose sum is σ = 18500832. Its totient is φ = 1668096.

The previous prime is 6431323. The next prime is 6431351. The reversal of 6431340 is 431346.

6431340 is nontrivially palindromic in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772 + ... + 3668.

It is an arithmetic number, because the mean of its divisors is an integer number (385434).

Almost surely, 2^6431340 is an apocalyptic number.

6431340 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 6431340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9250416).

6431340 is an abundant number, since it is smaller than the sum of its proper divisors (12069492).

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

6431340 is a wasteful number, since it uses less digits than its factorization.

6431340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946 (or 2944 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 6431340 is about 2536.0086750640. The cubic root of 6431340 is about 185.9661170793.

Adding to 6431340 its reverse (431346), we get a palindrome (6862686).

The spelling of 6431340 in words is "six million, four hundred thirty-one thousand, three hundred forty".