1995998 has 8 divisors (see below), whose sum is σ = 3004560. Its totient is φ = 994480.

The previous prime is 1995991. The next prime is 1996013. The reversal of 1995998 is 8995991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995991) 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, 983 + ... + 2226.

It is an arithmetic number, because the mean of its divisors is an integer number (375570).

2^1995998 is an apocalyptic number.

1995998 is a deficient number, since it is larger than the sum of its proper divisors (1008562).

1995998 is a wasteful number, since it uses less digits than its factorization.

1995998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522.

The product of its digits is 262440, while the sum is 50.

The square root of 1995998 is about 1412.7979331808. The cubic root of 1995998 is about 125.9080121406.

It can be divided in two parts, 1995 and 998, that multiplied together give a triangular number (1991010 = T₁₉₉₅).

The spelling of 1995998 in words is "one million, nine hundred ninety-five thousand, nine hundred ninety-eight".