1995620 has 48 divisors (see below), whose sum is σ = 4693248. Its totient is φ = 706560.

The previous prime is 1995611. The next prime is 1995629. The reversal of 1995620 is 265991.

It is an interprime number because it is at equal distance from previous prime (1995611) and next prime (1995629).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10244 + ... + 10436.

It is an arithmetic number, because the mean of its divisors is an integer number (97776).

2^1995620 is an apocalyptic number.

1995620 is a gapful number since it is divisible by the number (10) 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 1995620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2346624).

1995620 is an abundant number, since it is smaller than the sum of its proper divisors (2697628).

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

1995620 is a wasteful number, since it uses less digits than its factorization.

1995620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1995620 is about 1412.6641497539. The cubic root of 1995620 is about 125.9000635298.

The spelling of 1995620 in words is "one million, nine hundred ninety-five thousand, six hundred twenty".