39643434 has 12 divisors (see below), whose sum is σ = 85894146. Its totient is φ = 13214472.

The previous prime is 39643403. The next prime is 39643501. The reversal of 39643434 is 43434693.

It is a happy number.

39643434 is a `hidden beast` number, since 3 + 9 + 643 + 4 + 3 + 4 = 666.

39643434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 27720225 + 11923209 = 5265^2 + 3453^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1101189 + ... + 1101224.

Almost surely, 2^39643434 is an apocalyptic number.

39643434 is an abundant number, since it is smaller than the sum of its proper divisors (46250712).

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

39643434 is a wasteful number, since it uses less digits than its factorization.

39643434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202421 (or 2202418 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 39643434 is about 6296.3032010855. The cubic root of 39643434 is about 340.9759559705.

The spelling of 39643434 in words is "thirty-nine million, six hundred forty-three thousand, four hundred thirty-four".