39031668 has 36 divisors (see below), whose sum is σ = 106254148. Its totient is φ = 12009600.

The previous prime is 39031649. The next prime is 39031687. The reversal of 39031668 is 86613093.

It is a happy number.

39031668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39031649) and next prime (39031687).

It can be written as a sum of positive squares in 2 ways, for example, as 15586704 + 23444964 = 3948^2 + 4842^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×39031668² = 3046942213724448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 41233 + ... + 42168.

Almost surely, 2^39031668 is an apocalyptic number.

It is an amenable number.

39031668 is an abundant number, since it is smaller than the sum of its proper divisors (67222480).

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

39031668 is a wasteful number, since it uses less digits than its factorization.

39031668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83424 (or 83419 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 39031668 is about 6247.5329530944. The cubic root of 39031668 is about 339.2129082582.

The spelling of 39031668 in words is "thirty-nine million, thirty-one thousand, six hundred sixty-eight".