6340440 has 32 divisors (see below), whose sum is σ = 19021680. Its totient is φ = 1690752.

The previous prime is 6340429. The next prime is 6340457. The reversal of 6340440 is 440436.

6340440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26299 + ... + 26538.

Almost surely, 2^6340440 is an apocalyptic number.

6340440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6340440 is an abundant number, since it is smaller than the sum of its proper divisors (12681240).

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

6340440 is a wasteful number, since it uses less digits than its factorization.

6340440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52851 (or 52847 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 6340440 is about 2518.0230340487. The cubic root of 6340440 is about 185.0858136096.

Adding to 6340440 its reverse (440436), we get a palindrome (6780876).

The spelling of 6340440 in words is "six million, three hundred forty thousand, four hundred forty".