1995980 has 48 divisors (see below), whose sum is σ = 4898880. Its totient is φ = 668928.

The previous prime is 1995979. The next prime is 1995989. The reversal of 1995980 is 895991.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1995989) 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, 7286 + ... + 7554.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^1995980 is an apocalyptic number.

1995980 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 1995980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2449440).

1995980 is an abundant number, since it is smaller than the sum of its proper divisors (2902900).

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

1995980 is a wasteful number, since it uses less digits than its factorization.

1995980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 1995980 is about 1412.7915628287. The cubic root of 1995980 is about 125.9076336580.

The spelling of 1995980 in words is "one million, nine hundred ninety-five thousand, nine hundred eighty".