1006840 has 16 divisors (see below), whose sum is σ = 2265480. Its totient is φ = 402720.

The previous prime is 1006799. The next prime is 1006847. The reversal of 1006840 is 486001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12546 + ... + 12625.

2^1006840 is an apocalyptic number.

1006840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1006840 is an abundant number, since it is smaller than the sum of its proper divisors (1258640).

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

1006840 is a wasteful number, since it uses less digits than its factorization.

1006840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25182 (or 25178 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1006840 is about 1003.4141717157. The cubic root of 1006840 is about 100.2274821264.

The spelling of 1006840 in words is "one million, six thousand, eight hundred forty".