1989598 has 16 divisors (see below), whose sum is σ = 3270960. Its totient is φ = 902016.

The previous prime is 1989583. The next prime is 1989613. The reversal of 1989598 is 8959891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1989583) and next prime (1989613).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886 + ... + 2182.

It is an arithmetic number, because the mean of its divisors is an integer number (204435).

2^1989598 is an apocalyptic number.

1989598 is a deficient number, since it is larger than the sum of its proper divisors (1281362).

1989598 is a wasteful number, since it uses less digits than its factorization.

1989598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371.

The product of its digits is 233280, while the sum is 49.

The square root of 1989598 is about 1410.5311056478. The cubic root of 1989598 is about 125.7732968969.

The spelling of 1989598 in words is "one million, nine hundred eighty-nine thousand, five hundred ninety-eight".