6840392 has 64 divisors (see below), whose sum is σ = 15104880. Its totient is φ = 2875392.

The previous prime is 6840377. The next prime is 6840413. The reversal of 6840392 is 2930486.

It can be written as a sum of positive squares in 8 ways, for example, as 4104676 + 2735716 = 2026^2 + 1654^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93668 + ... + 93740.

Almost surely, 2^6840392 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 6840392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7552440).

6840392 is an abundant number, since it is smaller than the sum of its proper divisors (8264488).

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

6840392 is a wasteful number, since it uses less digits than its factorization.

6840392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6840392 is about 2615.4143075238. The cubic root of 6840392 is about 189.8280253664.

The spelling of 6840392 in words is "six million, eight hundred forty thousand, three hundred ninety-two".