840604 has 12 divisors (see below), whose sum is σ = 1535184. Its totient is φ = 401984.

The previous prime is 840601. The next prime is 840611. The reversal of 840604 is 406048.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4477 + ... + 4660.

It is an arithmetic number, because the mean of its divisors is an integer number (127932).

2⁸⁴⁰⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

840604 is a deficient number, since it is larger than the sum of its proper divisors (694580).

840604 is a wasteful number, since it uses less digits than its factorization.

840604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9164 (or 9162 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 840604 is about 916.8445887935. The cubic root of 840604 is about 94.3764891656.

It can be divided in two parts, 840 and 604, that added together give a square (1444 = 38²).

The spelling of 840604 in words is "eight hundred forty thousand, six hundred four".