1988788 has 6 divisors (see below), whose sum is σ = 3480386. Its totient is φ = 994392.

The previous prime is 1988759. The next prime is 1988797. The reversal of 1988788 is 8878891.

It can be written as a sum of positive squares in only one way, i.e., 1542564 + 446224 = 1242^2 + 668^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248595 + ... + 248602.

2^1988788 is an apocalyptic number.

It is an amenable number.

1988788 is a deficient number, since it is larger than the sum of its proper divisors (1491598).

1988788 is a wasteful number, since it uses less digits than its factorization.

1988788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497201 (or 497199 counting only the distinct ones).

The product of its digits is 258048, while the sum is 49.

The square root of 1988788 is about 1410.2439505277. The cubic root of 1988788 is about 125.7562264135.

The spelling of 1988788 in words is "one million, nine hundred eighty-eight thousand, seven hundred eighty-eight".