1988992 has 32 divisors (see below), whose sum is σ = 4069800. Its totient is φ = 967680.

The previous prime is 1988963. The next prime is 1988999. The reversal of 1988992 is 2998891.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988999) 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, 5059 + ... + 5437.

2^1988992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2034900).

1988992 is an abundant number, since it is smaller than the sum of its proper divisors (2080808).

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

1988992 is an equidigital number, since it uses as much as digits as its factorization.

1988992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 422 counting only the distinct ones).

The product of its digits is 93312, while the sum is 46.

The square root of 1988992 is about 1410.3162765848. The cubic root of 1988992 is about 125.7605260830.

The spelling of 1988992 in words is "one million, nine hundred eighty-eight thousand, nine hundred ninety-two".