1989498 has 48 divisors (see below), whose sum is σ = 4744224. Its totient is φ = 554400.

The previous prime is 1989479. The next prime is 1989499. The reversal of 1989498 is 8949891.

It is not an unprimeable number, because it can be changed into a prime (1989499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19648 + ... + 19748.

It is an arithmetic number, because the mean of its divisors is an integer number (98838).

2^1989498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2372112).

1989498 is an abundant number, since it is smaller than the sum of its proper divisors (2754726).

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

1989498 is a wasteful number, since it uses less digits than its factorization.

1989498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 180 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 1989498 is about 1410.4956575616. The cubic root of 1989498 is about 125.7711896806.

The spelling of 1989498 in words is "one million, nine hundred eighty-nine thousand, four hundred ninety-eight".