1684494 has 48 divisors (see below), whose sum is σ = 4324320. Its totient is φ = 463680.

The previous prime is 1684489. The next prime is 1684511. The reversal of 1684494 is 4944861.

It is a happy number.

1684494 is a `hidden beast` number, since 168 + 4 + 494 = 666.

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8³ + 4 + 4⁴ + 9 + 4⁶ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3424 + ... + 3884.

It is an arithmetic number, because the mean of its divisors is an integer number (90090).

2^1684494 is an apocalyptic number.

1684494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1684494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2162160).

1684494 is an abundant number, since it is smaller than the sum of its proper divisors (2639826).

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

1684494 is a wasteful number, since it uses less digits than its factorization.

1684494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 502 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1684494 is about 1297.8805800227. The cubic root of 1684494 is about 118.9843446204.

Adding to 1684494 its sum of digits (36), we get a triangular number (1684530 = T₁₈₃₅).

The spelling of 1684494 in words is "one million, six hundred eighty-four thousand, four hundred ninety-four".