840808 has 16 divisors (see below), whose sum is σ = 1586880. Its totient is φ = 417648.

The previous prime is 840767. The next prime is 840817. The reversal of 840808 is 808048.

It is a happy number.

It is an unprimeable number.

840808 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 3 ways as a sum of consecutive naturals, for example, 1585 + ... + 2047.

It is an arithmetic number, because the mean of its divisors is an integer number (99180).

2⁸⁴⁰⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

840808 is a deficient number, since it is larger than the sum of its proper divisors (746072).

840808 is a wasteful number, since it uses less digits than its factorization.

840808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 840808 is about 916.9558331785. The cubic root of 840808 is about 94.3841230600.

The spelling of 840808 in words is "eight hundred forty thousand, eight hundred eight".