1980366 has 8 divisors (see below), whose sum is σ = 3960744. Its totient is φ = 660120.

The previous prime is 1980361. The next prime is 1980367. The reversal of 1980366 is 6630891.

It is a sphenic number, since it is the product of 3 distinct primes.

1980366 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980361) 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, 165025 + ... + 165036.

It is an arithmetic number, because the mean of its divisors is an integer number (495093).

2^1980366 is an apocalyptic number.

1980366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1980366 is a wasteful number, since it uses less digits than its factorization.

1980366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330066.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1980366 is about 1407.2547743746. The cubic root of 1980366 is about 125.5784602737.

It can be divided in two parts, 1980 and 366, that added together give a triangular number (2346 = T₆₈).

The spelling of 1980366 in words is "one million, nine hundred eighty thousand, three hundred sixty-six".