1995856 has 20 divisors (see below), whose sum is σ = 3918400. Its totient is φ = 984672.

The previous prime is 1995841. The next prime is 1995857. The reversal of 1995856 is 6585991.

1995856 = 94² + 95² + ... + 189².

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475 + ... + 2053.

It is an arithmetic number, because the mean of its divisors is an integer number (195920).

2^1995856 is an apocalyptic number.

1995856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1995856 is the 894-th centered pentagonal number.

It is an amenable number.

1995856 is a deficient number, since it is larger than the sum of its proper divisors (1922544).

1995856 is a wasteful number, since it uses less digits than its factorization.

1995856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666 (or 1660 counting only the distinct ones).

The product of its digits is 97200, while the sum is 43.

The square root of 1995856 is about 1412.7476774003. The cubic root of 1995856 is about 125.9050262722.

The spelling of 1995856 in words is "one million, nine hundred ninety-five thousand, eight hundred fifty-six".