1980128 has 12 divisors (see below), whose sum is σ = 3898440. Its totient is φ = 990048.

The previous prime is 1980113. The next prime is 1980169. The reversal of 1980128 is 8210891.

It is a self number, because there is not a number n which added to its sum of digits gives 1980128.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30908 + ... + 30971.

It is an arithmetic number, because the mean of its divisors is an integer number (324870).

2^1980128 is an apocalyptic number.

It is an amenable number.

1980128 is a deficient number, since it is larger than the sum of its proper divisors (1918312).

1980128 is an equidigital number, since it uses as much as digits as its factorization.

1980128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61889 (or 61881 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1980128 is about 1407.1702100315. The cubic root of 1980128 is about 125.5734294072.

The spelling of 1980128 in words is "one million, nine hundred eighty thousand, one hundred twenty-eight".