1980928 has 40 divisors (see below), whose sum is σ = 4087908. Its totient is φ = 958464.

The previous prime is 1980919. The next prime is 1980929. The reversal of 1980928 is 8290891.

It can be written as a sum of positive squares in 2 ways, for example, as 1937664 + 43264 = 1392^2 + 208^2 .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1980929) 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, 27100 + ... + 27172.

2^1980928 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 1980928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2043954).

1980928 is an abundant number, since it is smaller than the sum of its proper divisors (2106980).

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

1980928 is an frugal number, since it uses more digits than its factorization.

1980928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1980928 is about 1407.4544397600. The cubic root of 1980928 is about 125.5903382834.

Subtracting from 1980928 its sum of digits (37), we obtain a palindrome (1980891).

The spelling of 1980928 in words is "one million, nine hundred eighty thousand, nine hundred twenty-eight".