2031620 has 12 divisors (see below), whose sum is σ = 4266444. Its totient is φ = 812640.

The previous prime is 2031611. The next prime is 2031671. The reversal of 2031620 is 261302.

It can be written as a sum of positive squares in 2 ways, for example, as 817216 + 1214404 = 904^2 + 1102^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2031595 and 2031604.

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, 50771 + ... + 50810.

It is an arithmetic number, because the mean of its divisors is an integer number (355537).

2^2031620 is an apocalyptic number.

2031620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031620 is an abundant number, since it is smaller than the sum of its proper divisors (2234824).

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

2031620 is a wasteful number, since it uses less digits than its factorization.

2031620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101590 (or 101588 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2031620 is about 1425.3490800502. The cubic root of 2031620 is about 126.6526146308.

Adding to 2031620 its reverse (261302), we get a palindrome (2292922).

The spelling of 2031620 in words is "two million, thirty-one thousand, six hundred twenty".