939840 has 112 divisors (see below), whose sum is σ = 3291840. Its totient is φ = 225280.

The previous prime is 939839. The next prime is 939847. The reversal of 939840 is 48939.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 939840.

It is not an unprimeable number, because it can be changed into a prime (939847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10516 + ... + 10604.

2⁹³⁹⁸⁴⁰ 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 939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645920).

939840 is an abundant number, since it is smaller than the sum of its proper divisors (2352000).

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

939840 is a wasteful number, since it uses less digits than its factorization.

939840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 110 counting only the distinct ones).

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

The square root of 939840 is about 969.4534542720. The cubic root of 939840 is about 97.9530526208.

The spelling of 939840 in words is "nine hundred thirty-nine thousand, eight hundred forty".