1988816 has 10 divisors (see below), whose sum is σ = 3853362. Its totient is φ = 994400.

The previous prime is 1988807. The next prime is 1988837. The reversal of 1988816 is 6188891.

It can be written as a sum of positive squares in only one way, i.e., 1948816 + 40000 = 1396^2 + 200^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62135 + ... + 62166.

2^1988816 is an apocalyptic number.

1988816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1988816 is a deficient number, since it is larger than the sum of its proper divisors (1864546).

1988816 is a wasteful number, since it uses less digits than its factorization.

1988816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124309 (or 124303 counting only the distinct ones).

The product of its digits is 27648, while the sum is 41.

The square root of 1988816 is about 1410.2538778532. The cubic root of 1988816 is about 125.7568165817.

The spelling of 1988816 in words is "one million, nine hundred eighty-eight thousand, eight hundred sixteen".