1988798 has 8 divisors (see below), whose sum is σ = 3409392. Its totient is φ = 852336.

The previous prime is 1988797. The next prime is 1988801. The reversal of 1988798 is 8978891.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71015 + ... + 71042.

It is an arithmetic number, because the mean of its divisors is an integer number (426174).

2^1988798 is an apocalyptic number.

1988798 is a deficient number, since it is larger than the sum of its proper divisors (1420594).

1988798 is a wasteful number, since it uses less digits than its factorization.

1988798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142066.

The product of its digits is 290304, while the sum is 50.

The square root of 1988798 is about 1410.2474960091. The cubic root of 1988798 is about 125.7564371885.

The spelling of 1988798 in words is "one million, nine hundred eighty-eight thousand, seven hundred ninety-eight".