6349640 has 32 divisors (see below), whose sum is σ = 15586560. Its totient is φ = 2308800.

The previous prime is 6349631. The next prime is 6349643. The reversal of 6349640 is 469436.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6349597 and 6349606.

It is not an unprimeable number, because it can be changed into a prime (6349643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6776 + ... + 7655.

It is an arithmetic number, because the mean of its divisors is an integer number (487080).

Almost surely, 2^6349640 is an apocalyptic number.

It is an amenable number.

6349640 is an abundant number, since it is smaller than the sum of its proper divisors (9236920).

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

6349640 is a wasteful number, since it uses less digits than its factorization.

6349640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14453 (or 14449 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 6349640 is about 2519.8492018373. The cubic root of 6349640 is about 185.1752903948.

It can be divided in two parts, 63496 and 40, that added together give a palindrome (63536).

The spelling of 6349640 in words is "six million, three hundred forty-nine thousand, six hundred forty".