1606720 has 28 divisors (see below), whose sum is σ = 3826764. Its totient is φ = 642560.

The previous prime is 1606681. The next prime is 1606723. The reversal of 1606720 is 276061.

It can be written as a sum of positive squares in 2 ways, for example, as 1065024 + 541696 = 1032^2 + 736^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1606691 and 1606700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2191 + ... + 2830.

2^1606720 is an apocalyptic number.

1606720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1606720 is an abundant number, since it is smaller than the sum of its proper divisors (2220044).

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

1606720 is an equidigital number, since it uses as much as digits as its factorization.

1606720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038 (or 5028 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1606720 is about 1267.5645940148. The cubic root of 1606720 is about 117.1242258123.

The spelling of 1606720 in words is "one million, six hundred six thousand, seven hundred twenty".