943640 has 32 divisors (see below), whose sum is σ = 2194560. Its totient is φ = 364800.

The previous prime is 943637. The next prime is 943651. The reversal of 943640 is 46349.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 943640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860 + ... + 1620.

It is an arithmetic number, because the mean of its divisors is an integer number (68580).

2⁹⁴³⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 943640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097280).

943640 is an abundant number, since it is smaller than the sum of its proper divisors (1250920).

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

943640 is a wasteful number, since it uses less digits than its factorization.

943640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 943640 is about 971.4113443851. The cubic root of 943640 is about 98.0848910413.

Adding to 943640 its reverse (46349), we get a palindrome (989989).

The spelling of 943640 in words is "nine hundred forty-three thousand, six hundred forty".