1966280 has 16 divisors (see below), whose sum is σ = 4424220. Its totient is φ = 786496.

The previous prime is 1966259. The next prime is 1966297. The reversal of 1966280 is 826691.

It can be written as a sum of positive squares in 2 ways, for example, as 1965604 + 676 = 1402^2 + 26^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24539 + ... + 24618.

2^1966280 is an apocalyptic number.

1966280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1966280 is an abundant number, since it is smaller than the sum of its proper divisors (2457940).

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

1966280 is a wasteful number, since it uses less digits than its factorization.

1966280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49168 (or 49164 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1966280 is about 1402.2410634409. The cubic root of 1966280 is about 125.2800122766.

The spelling of 1966280 in words is "one million, nine hundred sixty-six thousand, two hundred eighty".