1608820 has 24 divisors (see below), whose sum is σ = 3402504. Its totient is φ = 638976.

The previous prime is 1608773. The next prime is 1608821. The reversal of 1608820 is 288061.

It can be written as a sum of positive squares in 4 ways, for example, as 139876 + 1468944 = 374^2 + 1212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4984 + ... + 5296.

It is an arithmetic number, because the mean of its divisors is an integer number (141771).

2^1608820 is an apocalyptic number.

1608820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1608820 is an abundant number, since it is smaller than the sum of its proper divisors (1793684).

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

1608820 is a wasteful number, since it uses less digits than its factorization.

1608820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1608820 is about 1268.3926836749. The cubic root of 1608820 is about 117.1752311304.

The spelling of 1608820 in words is "one million, six hundred eight thousand, eight hundred twenty".