1890980 has 48 divisors (see below), whose sum is σ = 4892160. Its totient is φ = 597888.

The previous prime is 1890953. The next prime is 1890997. The reversal of 1890980 is 890981.

It is a happy number.

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 1890980.

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 in 15 ways as a sum of consecutive naturals, for example, 1301 + ... + 2339.

It is an arithmetic number, because the mean of its divisors is an integer number (101920).

2^1890980 is an apocalyptic number.

1890980 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 1890980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2446080).

1890980 is an abundant number, since it is smaller than the sum of its proper divisors (3001180).

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

1890980 is a wasteful number, since it uses less digits than its factorization.

1890980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1890980 is about 1375.1290848499. The cubic root of 1890980 is about 123.6599249293.

Subtracting from 1890980 its reverse (890981), we obtain a palindrome (999999).

The spelling of 1890980 in words is "one million, eight hundred ninety thousand, nine hundred eighty".