1995540 has 48 divisors (see below), whose sum is σ = 5671680. Its totient is φ = 524160.

The previous prime is 1995533. The next prime is 1995541. The reversal of 1995540 is 455991.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4530 + ... + 4950.

It is an arithmetic number, because the mean of its divisors is an integer number (118160).

2^1995540 is an apocalyptic number.

1995540 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 1995540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2835840).

1995540 is an abundant number, since it is smaller than the sum of its proper divisors (3676140).

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

1995540 is a wasteful number, since it uses less digits than its factorization.

1995540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 1995540 is about 1412.6358341767. The cubic root of 1995540 is about 125.8983811555.

It can be divided in two parts, 19 and 95540, that added together give a palindrome (95559).

The spelling of 1995540 in words is "one million, nine hundred ninety-five thousand, five hundred forty".