1989504 has 96 divisors (see below), whose sum is σ = 6285240. Its totient is φ = 599040.

The previous prime is 1989499. The next prime is 1989517. The reversal of 1989504 is 4059891.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12594 + ... + 12750.

2^1989504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3142620).

1989504 is an abundant number, since it is smaller than the sum of its proper divisors (4295736).

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

1989504 is a wasteful number, since it uses less digits than its factorization.

1989504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1989504 is about 1410.4977844719. The cubic root of 1989504 is about 125.7713161155.

The spelling of 1989504 in words is "one million, nine hundred eighty-nine thousand, five hundred four".