840872 has 16 divisors (see below), whose sum is σ = 1595700. Its totient is φ = 415360.

The previous prime is 840863. The next prime is 840907. The reversal of 840872 is 278048.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 5476 = 914^2 + 74^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122 + ... + 1302.

2⁸⁴⁰⁸⁷² is an apocalyptic number.

It is an amenable number.

840872 is a deficient number, since it is larger than the sum of its proper divisors (754828).

840872 is a wasteful number, since it uses less digits than its factorization.

840872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 840872 is about 916.9907305966. The cubic root of 840872 is about 94.3865177528.

The spelling of 840872 in words is "eight hundred forty thousand, eight hundred seventy-two".