1980530 has 32 divisors (see below), whose sum is σ = 3801600. Its totient is φ = 741312.

The previous prime is 1980529. The next prime is 1980577. The reversal of 1980530 is 350891.

It is a self number, because there is not a number n which added to its sum of digits gives 1980530.

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, 18116 + ... + 18224.

It is an arithmetic number, because the mean of its divisors is an integer number (118800).

2^1980530 is an apocalyptic number.

1980530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1980530 is a deficient number, since it is larger than the sum of its proper divisors (1821070).

1980530 is a wasteful number, since it uses less digits than its factorization.

1980530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1980530 is about 1407.3130426455. The cubic root of 1980530 is about 125.5819266866.

The spelling of 1980530 in words is "one million, nine hundred eighty thousand, five hundred thirty".