1988195 has 16 divisors (see below), whose sum is σ = 2675808. Its totient is φ = 1405440.

The previous prime is 1988183. The next prime is 1988197. The reversal of 1988195 is 5918891.

It is not a de Polignac number, because 1988195 - 2⁸ = 1987939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1988197) 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, 1547 + ... + 2523.

It is an arithmetic number, because the mean of its divisors is an integer number (167238).

2^1988195 is an apocalyptic number.

1988195 is a deficient number, since it is larger than the sum of its proper divisors (687613).

1988195 is a wasteful number, since it uses less digits than its factorization.

1988195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030.

The product of its digits is 25920, while the sum is 41.

The square root of 1988195 is about 1410.0336875408. The cubic root of 1988195 is about 125.7437261948.

The spelling of 1988195 in words is "one million, nine hundred eighty-eight thousand, one hundred ninety-five".