2011720 has 32 divisors (see below), whose sum is σ = 4766400. Its totient is φ = 762048.

The previous prime is 2011703. The next prime is 2011733. The reversal of 2011720 is 271102.

It is a plaindrome in base 13.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 2011720.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (148950).

2^2011720 is an apocalyptic number.

2011720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011720 is an abundant number, since it is smaller than the sum of its proper divisors (2754680).

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

2011720 is a wasteful number, since it uses less digits than its factorization.

2011720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677 (or 2673 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 2011720 is about 1418.3511553914. The cubic root of 2011720 is about 126.2377304026.

Adding to 2011720 its reverse (271102), we get a palindrome (2282822).

The spelling of 2011720 in words is "two million, eleven thousand, seven hundred twenty".