840606 has 24 divisors (see below), whose sum is σ = 1822680. Its totient is φ = 258336.

The previous prime is 840601. The next prime is 840611. The reversal of 840606 is 606048.

It is an interprime number because it is at equal distance from previous prime (840601) and next prime (840611).

840606 is a modest number, since divided by 606 gives 84 as remainder.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840606.

It is not an unprimeable number, because it can be changed into a prime (840601) by changing a digit.

840606 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 600 + ... + 1428.

It is an arithmetic number, because the mean of its divisors is an integer number (75945).

2⁸⁴⁰⁶⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911340).

840606 is an abundant number, since it is smaller than the sum of its proper divisors (982074).

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

840606 is a wasteful number, since it uses less digits than its factorization.

840606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 840606 is about 916.8456794903. The cubic root of 840606 is about 94.3765640137.

The spelling of 840606 in words is "eight hundred forty thousand, six hundred six".