2189620 has 12 divisors (see below), whose sum is σ = 4598244. Its totient is φ = 875840.

The previous prime is 2189609. The next prime is 2189633. The reversal of 2189620 is 269812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 1653796 = 732^2 + 1286^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54721 + ... + 54760.

It is an arithmetic number, because the mean of its divisors is an integer number (383187).

2^2189620 is an apocalyptic number.

2189620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2189620 is an abundant number, since it is smaller than the sum of its proper divisors (2408624).

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

2189620 is a wasteful number, since it uses less digits than its factorization.

2189620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109490 (or 109488 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2189620 is about 1479.7364630231. The cubic root of 2189620 is about 129.8542745778.

It can be divided in two parts, 2189 and 620, that added together give a square (2809 = 53²).

The spelling of 2189620 in words is "two million, one hundred eighty-nine thousand, six hundred twenty".