1684398 has 16 divisors (see below), whose sum is σ = 3396096. Its totient is φ = 556920.

The previous prime is 1684387. The next prime is 1684399. The reversal of 1684398 is 8934861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286 + ... + 1857.

It is an arithmetic number, because the mean of its divisors is an integer number (212256).

2^1684398 is an apocalyptic number.

1684398 is an abundant number, since it is smaller than the sum of its proper divisors (1711698).

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

1684398 is a wasteful number, since it uses less digits than its factorization.

1684398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279.

The product of its digits is 41472, while the sum is 39.

The square root of 1684398 is about 1297.8435961240. The cubic root of 1684398 is about 118.9820842553.

The spelling of 1684398 in words is "one million, six hundred eighty-four thousand, three hundred ninety-eight".