1988736 has 32 divisors (see below), whose sum is σ = 5283600. Its totient is φ = 662784.

The previous prime is 1988729. The next prime is 1988759. The reversal of 1988736 is 6378891.

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

Its product of digits (72576) is a multiple of the sum of its prime divisors (5184).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206 + ... + 2973.

2^1988736 is an apocalyptic number.

1988736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1988736 is an abundant number, since it is smaller than the sum of its proper divisors (3294864).

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

1988736 is an equidigital number, since it uses as much as digits as its factorization.

1988736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5196 (or 5184 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 1988736 is about 1410.2255138807. The cubic root of 1988736 is about 125.7551303723.

The spelling of 1988736 in words is "one million, nine hundred eighty-eight thousand, seven hundred thirty-six".