840898 has 8 divisors (see below), whose sum is σ = 1285308. Its totient is φ = 412464.

The previous prime is 840863. The next prime is 840907. The reversal of 840898 is 898048.

It can be written as a sum of positive squares in 2 ways, for example, as 840889 + 9 = 917^2 + 3^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3861 + ... + 4072.

2⁸⁴⁰⁸⁹⁸ is an apocalyptic number.

840898 is a deficient number, since it is larger than the sum of its proper divisors (444410).

840898 is a wasteful number, since it uses less digits than its factorization.

840898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7988.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 840898 is about 917.0049072933. The cubic root of 840898 is about 94.3874905621.

It can be divided in two parts, 8 and 40898, that multiplied together give a square (327184 = 572²).

The spelling of 840898 in words is "eight hundred forty thousand, eight hundred ninety-eight".