944640 has 120 divisors (see below), whose sum is σ = 3351348. Its totient is φ = 245760.

The previous prime is 944621. The next prime is 944651. The reversal of 944640 is 46449.

It can be written as a sum of positive squares in 2 ways, for example, as 831744 + 112896 = 912^2 + 336^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 164 × 36 × 160.

It is a congruent number.

It is an unprimeable number.

944640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23020 + ... + 23060.

2⁹⁴⁴⁶⁴⁰ is an apocalyptic number.

944640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

944640 is the 615-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1675674).

944640 is an abundant number, since it is smaller than the sum of its proper divisors (2406708).

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

944640 is a wasteful number, since it uses less digits than its factorization.

944640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 944640 is about 971.9259231032. The cubic root of 944640 is about 98.1195265180.

The spelling of 944640 in words is "nine hundred forty-four thousand, six hundred forty".