939640 has 48 divisors (see below), whose sum is σ = 2305800. Its totient is φ = 344448.

The previous prime is 939623. The next prime is 939649. The reversal of 939640 is 46939.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6691 + ... + 6829.

2⁹³⁹⁶⁴⁰ 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 939640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152900).

939640 is an abundant number, since it is smaller than the sum of its proper divisors (1366160).

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

939640 is a wasteful number, since it uses less digits than its factorization.

939640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 939640 is about 969.3502978800. The cubic root of 939640 is about 97.9461039202.

The spelling of 939640 in words is "nine hundred thirty-nine thousand, six hundred forty".