1989760 has 32 divisors (see below), whose sum is σ = 4758300. Its totient is φ = 795648.

The previous prime is 1989721. The next prime is 1989769. The reversal of 1989760 is 679891.

It can be written as a sum of positive squares in 2 ways, for example, as 1871424 + 118336 = 1368^2 + 344^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1989769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915 + ... + 2194.

2^1989760 is an apocalyptic number.

1989760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1989760 is an abundant number, since it is smaller than the sum of its proper divisors (2768540).

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

1989760 is an equidigital number, since it uses as much as digits as its factorization.

1989760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1989760 is about 1410.5885296570. The cubic root of 1989760 is about 125.7767104376.

The spelling of 1989760 in words is "one million, nine hundred eighty-nine thousand, seven hundred sixty".