2009620 has 24 divisors (see below), whose sum is σ = 4271400. Its totient is φ = 794112.

The previous prime is 2009603. The next prime is 2009639. The reversal of 2009620 is 269002.

2009620 = 359² + 360² + ... + 373².

It can be written as a sum of positive squares in 4 ways, for example, as 15876 + 1993744 = 126^2 + 1412^2 .

It is a congruent number.

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, 1216 + ... + 2344.

It is an arithmetic number, because the mean of its divisors is an integer number (177975).

2^2009620 is an apocalyptic number.

2009620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2009620 is an abundant number, since it is smaller than the sum of its proper divisors (2261780).

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

2009620 is a wasteful number, since it uses less digits than its factorization.

2009620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2009620 is about 1417.6106658741. The cubic root of 2009620 is about 126.1937893088.

The spelling of 2009620 in words is "two million, nine thousand, six hundred twenty".