2016720 has 60 divisors (see below), whose sum is σ = 6775236. Its totient is φ = 537600.

The previous prime is 2016697. The next prime is 2016733. The reversal of 2016720 is 276102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 876096 + 1140624 = 936^2 + 1068^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2016693 and 2016702.

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 11 ways as a sum of consecutive naturals, for example, 681 + ... + 2120.

2^2016720 is an apocalyptic number.

2016720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2016720 is an abundant number, since it is smaller than the sum of its proper divisors (4758516).

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

2016720 is a wasteful number, since it uses less digits than its factorization.

2016720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 2016720 is about 1420.1126715863. The cubic root of 2016720 is about 126.3422291146.

The spelling of 2016720 in words is "two million, sixteen thousand, seven hundred twenty".