1988242 has 8 divisors (see below), whose sum is σ = 3038796. Its totient is φ = 975312.

The previous prime is 1988237. The next prime is 1988243. The reversal of 1988242 is 2428891.

It can be written as a sum of positive squares in 2 ways, for example, as 1934881 + 53361 = 1391^2 + 231^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1988198 and 1988207.

It is not an unprimeable number, because it can be changed into a prime (1988243) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9273 + ... + 9484.

2^1988242 is an apocalyptic number.

1988242 is a deficient number, since it is larger than the sum of its proper divisors (1050554).

1988242 is a wasteful number, since it uses less digits than its factorization.

1988242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18812.

The product of its digits is 9216, while the sum is 34.

The square root of 1988242 is about 1410.0503537108. The cubic root of 1988242 is about 125.7447170279.

The spelling of 1988242 in words is "one million, nine hundred eighty-eight thousand, two hundred forty-two".