1609944 has 72 divisors (see below), whose sum is σ = 4811940. Its totient is φ = 447552.

The previous prime is 1609913. The next prime is 1609969. The reversal of 1609944 is 4499061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 43494 + ... + 43530.

2^1609944 is an apocalyptic number.

1609944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1609944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2405970).

1609944 is an abundant number, since it is smaller than the sum of its proper divisors (3201996).

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

1609944 is a wasteful number, since it uses less digits than its factorization.

1609944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1609944 is about 1268.8356867617. The cubic root of 1609944 is about 117.2025128855.

Multiplying 1609944 by its product of nonzero digits (7776), we get a square (12518924544 = 111888²).

The spelling of 1609944 in words is "one million, six hundred nine thousand, nine hundred forty-four".