1980194 has 16 divisors (see below), whose sum is σ = 3175200. Its totient is φ = 922944.

The previous prime is 1980191. The next prime is 1980221. The reversal of 1980194 is 4910891.

It is a self number, because there is not a number n which added to its sum of digits gives 1980194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980191) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4517 + ... + 4935.

It is an arithmetic number, because the mean of its divisors is an integer number (198450).

2^1980194 is an apocalyptic number.

1980194 is a deficient number, since it is larger than the sum of its proper divisors (1195006).

1980194 is a wasteful number, since it uses less digits than its factorization.

1980194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1980194 is about 1407.1936611568. The cubic root of 1980194 is about 125.5748245618.

The spelling of 1980194 in words is "one million, nine hundred eighty thousand, one hundred ninety-four".