939990 has 16 divisors (see below), whose sum is σ = 2256048. Its totient is φ = 250656.

The previous prime is 939989. The next prime is 939997. The reversal of 939990 is 99939.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15637 + ... + 15696.

It is an arithmetic number, because the mean of its divisors is an integer number (141003).

2⁹³⁹⁹⁹⁰ is an apocalyptic number.

939990 is an abundant number, since it is smaller than the sum of its proper divisors (1316058).

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

939990 is a wasteful number, since it uses less digits than its factorization.

939990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31343.

The product of its (nonzero) digits is 19683, while the sum is 39.

The square root of 939990 is about 969.5308143633. The cubic root of 939990 is about 97.9582634994.

The spelling of 939990 in words is "nine hundred thirty-nine thousand, nine hundred ninety".