1663830 has 96 divisors (see below), whose sum is σ = 5241600. Its totient is φ = 357696.

The previous prime is 1663813. The next prime is 1663861. The reversal of 1663830 is 383661.

It is a junction number, because it is equal to n+sod(n) for n = 1663794 and 1663803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11901 + ... + 12039.

It is an arithmetic number, because the mean of its divisors is an integer number (54600).

2^1663830 is an apocalyptic number.

1663830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2620800).

1663830 is an abundant number, since it is smaller than the sum of its proper divisors (3577770).

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

1663830 is a wasteful number, since it uses less digits than its factorization.

1663830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1663830 is about 1289.8953445920. The cubic root of 1663830 is about 118.4958071475.

The spelling of 1663830 in words is "one million, six hundred sixty-three thousand, eight hundred thirty".