1983646 has 8 divisors (see below), whose sum is σ = 3400560. Its totient is φ = 850128.

The previous prime is 1983643. The next prime is 1983647. The reversal of 1983646 is 6463891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983643) 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 3 ways as a sum of consecutive naturals, for example, 70831 + ... + 70858.

It is an arithmetic number, because the mean of its divisors is an integer number (425070).

2^1983646 is an apocalyptic number.

1983646 is a deficient number, since it is larger than the sum of its proper divisors (1416914).

1983646 is a wasteful number, since it uses less digits than its factorization.

1983646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141698.

The product of its digits is 31104, while the sum is 37.

The square root of 1983646 is about 1408.4196817710. The cubic root of 1983646 is about 125.6477522052.

It can be divided in two parts, 198 and 3646, that added together give a square (3844 = 62²).

The spelling of 1983646 in words is "one million, nine hundred eighty-three thousand, six hundred forty-six".