939209428 has 12 divisors (see below), whose sum is σ = 1700293140. Its totient is φ = 453411392.

The previous prime is 939209419. The next prime is 939209429. The reversal of 939209428 is 824902939.

It can be written as a sum of positive squares in 2 ways, for example, as 327537604 + 611671824 = 18098^2 + 24732^2 .

It is a super-2 number, since 2×939209428² = 1764228699288174368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939209429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4048201 + ... + 4048432.

It is an arithmetic number, because the mean of its divisors is an integer number (141691095).

Almost surely, 2^939209428 is an apocalyptic number.

It is an amenable number.

939209428 is a deficient number, since it is larger than the sum of its proper divisors (761083712).

939209428 is a wasteful number, since it uses less digits than its factorization.

939209428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8096666 (or 8096664 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 939209428 is about 30646.5239138144. The cubic root of 939209428 is about 979.3114099358.

The spelling of 939209428 in words is "nine hundred thirty-nine million, two hundred nine thousand, four hundred twenty-eight".