6840305 has 8 divisors (see below), whose sum is σ = 8473344. Its totient is φ = 5295600.

The previous prime is 6840299. The next prime is 6840313. The reversal of 6840305 is 5030486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6840305 - 2⁴ = 6840289 is a prime.

It is a Duffinian 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, 21911 + ... + 22220.

It is an arithmetic number, because the mean of its divisors is an integer number (1059168).

Almost surely, 2^6840305 is an apocalyptic number.

It is an amenable number.

6840305 is a deficient number, since it is larger than the sum of its proper divisors (1633039).

6840305 is a wasteful number, since it uses less digits than its factorization.

6840305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44167.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6840305 is about 2615.3976753068. The cubic root of 6840305 is about 189.8272205827.

The spelling of 6840305 in words is "six million, eight hundred forty thousand, three hundred five".