6849840 has 40 divisors (see below), whose sum is σ = 21235248. Its totient is φ = 1826560.

The previous prime is 6849797. The next prime is 6849851. The reversal of 6849840 is 489486.

It is a tau number, because it is divible by the number of its divisors (40).

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, 14031 + ... + 14510.

Almost surely, 2^6849840 is an apocalyptic number.

6849840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6849840 is an abundant number, since it is smaller than the sum of its proper divisors (14385408).

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

6849840 is a wasteful number, since it uses less digits than its factorization.

6849840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28557 (or 28551 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 6849840 is about 2617.2198990532. The cubic root of 6849840 is about 189.9153824500.

The spelling of 6849840 in words is "six million, eight hundred forty-nine thousand, eight hundred forty".