1995040 has 48 divisors (see below), whose sum is σ = 4855032. Its totient is φ = 774144.

The previous prime is 1995031. The next prime is 1995061. The reversal of 1995040 is 405991.

It can be written as a sum of positive squares in 4 ways, for example, as 1752976 + 242064 = 1324^2 + 492^2 .

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, 5752 + ... + 6088.

2^1995040 is an apocalyptic number.

1995040 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 1995040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2427516).

1995040 is an abundant number, since it is smaller than the sum of its proper divisors (2859992).

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

1995040 is a wasteful number, since it uses less digits than its factorization.

1995040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1995040 is about 1412.4588489581. The cubic root of 1995040 is about 125.8878652970.

It can be divided in two parts, 19 and 95040, that added together give a palindrome (95059).

The spelling of 1995040 in words is "one million, nine hundred ninety-five thousand, forty".