1989160 has 24 divisors (see below), whose sum is σ = 4495770. Its totient is φ = 792096.

The previous prime is 1989151. The next prime is 1989161. The reversal of 1989160 is 619891.

It can be written as a sum of positive squares in only one way, i.e., 1790244 + 198916 = 1338^2 + 446^2 .

It is not an unprimeable number, because it can be changed into a prime (1989161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8809 + ... + 9031.

2^1989160 is an apocalyptic number.

1989160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1989160 is an abundant number, since it is smaller than the sum of its proper divisors (2506610).

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

1989160 is an equidigital number, since it uses as much as digits as its factorization.

1989160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1989160 is about 1410.3758364351. The cubic root of 1989160 is about 125.7640667665.

The spelling of 1989160 in words is "one million, nine hundred eighty-nine thousand, one hundred sixty".