1989260 has 48 divisors (see below), whose sum is σ = 5146176. Its totient is φ = 628992.

The previous prime is 1989259. The next prime is 1989263. The reversal of 1989260 is 629891.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1989260.

It is not an unprimeable number, because it can be changed into a prime (1989263) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1274 + ... + 2366.

It is an arithmetic number, because the mean of its divisors is an integer number (107212).

2^1989260 is an apocalyptic number.

1989260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2573088).

1989260 is an abundant number, since it is smaller than the sum of its proper divisors (3156916).

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

1989260 is a wasteful number, since it uses less digits than its factorization.

1989260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1989260 is about 1410.4112875328. The cubic root of 1989260 is about 125.7661742216.

The spelling of 1989260 in words is "one million, nine hundred eighty-nine thousand, two hundred sixty".