2089780 has 96 divisors (see below), whose sum is σ = 5806080. Its totient is φ = 612480.

The previous prime is 2089751. The next prime is 2089781. The reversal of 2089780 is 879802.

2089780 = 165² + 166² + ... + 220².

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2089781) 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, 35391 + ... + 35449.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2^2089780 is an apocalyptic number.

2089780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2089780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2903040).

2089780 is an abundant number, since it is smaller than the sum of its proper divisors (3716300).

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

2089780 is a wasteful number, since it uses less digits than its factorization.

2089780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 2089780 is about 1445.6071388866. The cubic root of 2089780 is about 127.8498401889.

It can be divided in two parts, 20 and 89780, that multiplied together give a square (1795600 = 1340²).

The spelling of 2089780 in words is "two million, eighty-nine thousand, seven hundred eighty".