2019988 has 24 divisors (see below), whose sum is σ = 3686760. Its totient is φ = 967680.

The previous prime is 2019977. The next prime is 2020001. The reversal of 2019988 is 8899102.

It can be written as a sum of positive squares in 4 ways, for example, as 26244 + 1993744 = 162^2 + 1412^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 17820 + ... + 17932.

It is an arithmetic number, because the mean of its divisors is an integer number (153615).

2^2019988 is an apocalyptic number.

It is an amenable number.

2019988 is a deficient number, since it is larger than the sum of its proper divisors (1666772).

2019988 is a wasteful number, since it uses less digits than its factorization.

2019988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2019988 is about 1421.2628187637. The cubic root of 2019988 is about 126.4104361676.

The spelling of 2019988 in words is "two million, nineteen thousand, nine hundred eighty-eight".