1988330 has 8 divisors (see below), whose sum is σ = 3579012. Its totient is φ = 795328.

The previous prime is 1988323. The next prime is 1988339. The reversal of 1988330 is 338891.

It can be written as a sum of positive squares in 2 ways, for example, as 1697809 + 290521 = 1303^2 + 539^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1988339) 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, 99407 + ... + 99426.

2^1988330 is an apocalyptic number.

1988330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1988330 is a deficient number, since it is larger than the sum of its proper divisors (1590682).

1988330 is a wasteful number, since it uses less digits than its factorization.

1988330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198840.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1988330 is about 1410.0815579249. The cubic root of 1988330 is about 125.7465721629.

The spelling of 1988330 in words is "one million, nine hundred eighty-eight thousand, three hundred thirty".