1966820 has 24 divisors (see below), whose sum is σ = 4228224. Its totient is φ = 768096.

The previous prime is 1966819. The next prime is 1966831. The reversal of 1966820 is 286691.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (176176).

2^1966820 is an apocalyptic number.

1966820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1966820 is an abundant number, since it is smaller than the sum of its proper divisors (2261404).

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

1966820 is a wasteful number, since it uses less digits than its factorization.

1966820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339 (or 2337 counting only the distinct ones).

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

The square root of 1966820 is about 1402.4335991412. The cubic root of 1966820 is about 125.2914797880.

The spelling of 1966820 in words is "one million, nine hundred sixty-six thousand, eight hundred twenty".