39309028 has 36 divisors (see below), whose sum is σ = 76152076. Its totient is φ = 17740800.

The previous prime is 39309019. The next prime is 39309029. The reversal of 39309028 is 82090393.

It can be written as a sum of positive squares in 2 ways, for example, as 20142144 + 19166884 = 4488^2 + 4378^2 .

It is a junction number, because it is equal to n+sod(n) for n = 39308984 and 39309002.

It is not an unprimeable number, because it can be changed into a prime (39309029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116476 + ... + 116812.

Almost surely, 2^39309028 is an apocalyptic number.

It is an amenable number.

39309028 is a deficient number, since it is larger than the sum of its proper divisors (36843048).

39309028 is a wasteful number, since it uses less digits than its factorization.

39309028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 39309028 is about 6269.6912204669. The cubic root of 39309028 is about 340.0144976517.

The spelling of 39309028 in words is "thirty-nine million, three hundred nine thousand, twenty-eight".