6840740 has 12 divisors (see below), whose sum is σ = 14365596. Its totient is φ = 2736288.

The previous prime is 6840737. The next prime is 6840761. The reversal of 6840740 is 470486.

It can be written as a sum of positive squares in 2 ways, for example, as 2244004 + 4596736 = 1498^2 + 2144^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170999 + ... + 171038.

It is an arithmetic number, because the mean of its divisors is an integer number (1197133).

Almost surely, 2^6840740 is an apocalyptic number.

It is an amenable number.

6840740 is an abundant number, since it is smaller than the sum of its proper divisors (7524856).

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

6840740 is a wasteful number, since it uses less digits than its factorization.

6840740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342046 (or 342044 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 6840740 is about 2615.4808353341. The cubic root of 6840740 is about 189.8312444330.

The spelling of 6840740 in words is "six million, eight hundred forty thousand, seven hundred forty".