6840490 has 16 divisors (see below), whose sum is σ = 12394152. Its totient is φ = 2718144.

The previous prime is 6840473. The next prime is 6840497. The reversal of 6840490 is 940486.

It can be written as a sum of positive squares in 4 ways, for example, as 6589489 + 251001 = 2567^2 + 501^2 .

It is not an unprimeable number, because it can be changed into a prime (6840497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609 + ... + 3748.

Almost surely, 2^6840490 is an apocalyptic number.

6840490 is a deficient number, since it is larger than the sum of its proper divisors (5553662).

6840490 is a wasteful number, since it uses less digits than its factorization.

6840490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6840490 is about 2615.4330425381. The cubic root of 6840490 is about 189.8289318962.

The spelling of 6840490 in words is "six million, eight hundred forty thousand, four hundred ninety".