1660830 has 64 divisors (see below), whose sum is σ = 4354560. Its totient is φ = 404096.

The previous prime is 1660793. The next prime is 1660837. The reversal of 1660830 is 380661.

It is a self number, because there is not a number n which added to its sum of digits gives 1660830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660837) 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 31 ways as a sum of consecutive naturals, for example, 19969 + ... + 20051.

It is an arithmetic number, because the mean of its divisors is an integer number (68040).

2^1660830 is an apocalyptic number.

1660830 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 1660830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2177280).

1660830 is an abundant number, since it is smaller than the sum of its proper divisors (2693730).

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

1660830 is a wasteful number, since it uses less digits than its factorization.

1660830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1660830 is about 1288.7319348879. The cubic root of 1660830 is about 118.4245456020.

The spelling of 1660830 in words is "one million, six hundred sixty thousand, eight hundred thirty".