1996644 has 24 divisors (see below), whose sum is σ = 5017600. Its totient is φ = 614304.

The previous prime is 1996639. The next prime is 1996649. The reversal of 1996644 is 4466991.

It is an interprime number because it is at equal distance from previous prime (1996639) and next prime (1996649).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1996649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6244 + ... + 6555.

2^1996644 is an apocalyptic number.

It is an amenable number.

1996644 is an abundant number, since it is smaller than the sum of its proper divisors (3020956).

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

1996644 is a wasteful number, since it uses less digits than its factorization.

1996644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12819 (or 12817 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 1996644 is about 1413.0265390289. The cubic root of 1996644 is about 125.9215939515.

The spelling of 1996644 in words is "one million, nine hundred ninety-six thousand, six hundred forty-four".