1989508 has 12 divisors (see below), whose sum is σ = 3493980. Its totient is φ = 991232.

The previous prime is 1989499. The next prime is 1989517. The reversal of 1989508 is 8059891.

It is an interprime number because it is at equal distance from previous prime (1989499) and next prime (1989517).

It can be written as a sum of positive squares in 2 ways, for example, as 304704 + 1684804 = 552^2 + 1298^2 .

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 3 ways as a sum of consecutive naturals, for example, 708 + ... + 2116.

It is an arithmetic number, because the mean of its divisors is an integer number (291165).

2^1989508 is an apocalyptic number.

It is an amenable number.

1989508 is a deficient number, since it is larger than the sum of its proper divisors (1504472).

1989508 is a wasteful number, since it uses less digits than its factorization.

1989508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1989508 is about 1410.4992024103. The cubic root of 1989508 is about 125.7714004054.

The spelling of 1989508 in words is "one million, nine hundred eighty-nine thousand, five hundred eight".