939688128 has 140 divisors (see below), whose sum is σ = 2812775680. Its totient is φ = 310169088.

The previous prime is 939688121. The next prime is 939688129. The reversal of 939688128 is 821886939.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (939688121) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 564225 + ... + 565887.

Almost surely, 2^939688128 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 939688128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1406387840).

939688128 is an abundant number, since it is smaller than the sum of its proper divisors (1873087552).

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

939688128 is a wasteful number, since it uses less digits than its factorization.

939688128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796 (or 1777 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 939688128 is about 30654.3329400592. The cubic root of 939688128 is about 979.4777614560.

The spelling of 939688128 in words is "nine hundred thirty-nine million, six hundred eighty-eight thousand, one hundred twenty-eight".