1989708 has 24 divisors (see below), whose sum is σ = 5306112. Its totient is φ = 568464.

The previous prime is 1989683. The next prime is 1989721. The reversal of 1989708 is 8079891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1989708.

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, 11760 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (221088).

2^1989708 is an apocalyptic number.

It is an amenable number.

1989708 is an abundant number, since it is smaller than the sum of its proper divisors (3316404).

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

1989708 is a wasteful number, since it uses less digits than its factorization.

1989708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23701 (or 23699 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1989708 is about 1410.5700975138. The cubic root of 1989708 is about 125.7756147534.

1989708 divided by its sum of digits (42) gives a palindrome (47374).

The spelling of 1989708 in words is "one million, nine hundred eighty-nine thousand, seven hundred eight".