1988020 has 12 divisors (see below), whose sum is σ = 4174884. Its totient is φ = 795200.

The previous prime is 1988011. The next prime is 1988023. The reversal of 1988020 is 208891.

It can be written as a sum of positive squares in 2 ways, for example, as 992016 + 996004 = 996^2 + 998^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1988020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988023) 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, 49681 + ... + 49720.

It is an arithmetic number, because the mean of its divisors is an integer number (347907).

2^1988020 is an apocalyptic number.

1988020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1988020 is an abundant number, since it is smaller than the sum of its proper divisors (2186864).

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

1988020 is a wasteful number, since it uses less digits than its factorization.

1988020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99410 (or 99408 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1988020 is about 1409.9716309203. The cubic root of 1988020 is about 125.7400367851.

It can be divided in two parts, 19880 and 20, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 1988020 in words is "one million, nine hundred eighty-eight thousand, twenty".