6849640 has 64 divisors (see below), whose sum is σ = 18662400. Its totient is φ = 2208768.

The previous prime is 6849637. The next prime is 6849659. The reversal of 6849640 is 469486.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6849640.

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, 4041 + ... + 5479.

It is an arithmetic number, because the mean of its divisors is an integer number (291600).

Almost surely, 2^6849640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6849640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9331200).

6849640 is an abundant number, since it is smaller than the sum of its proper divisors (11812760).

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

6849640 is a wasteful number, since it uses less digits than its factorization.

6849640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6849640 is about 2617.1816902921. The cubic root of 6849640 is about 189.9135340639.

The spelling of 6849640 in words is "six million, eight hundred forty-nine thousand, six hundred forty".