39661938 has 12 divisors (see below), whose sum is σ = 85934238. Its totient is φ = 13220640.

The previous prime is 39661933. The next prime is 39661943. The reversal of 39661938 is 83916693.

39661938 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 (39661933) and next prime (39661943).

It can be written as a sum of positive squares in only one way, i.e., 35964009 + 3697929 = 5997^2 + 1923^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39661893 and 39661902.

It is not an unprimeable number, because it can be changed into a prime (39661933) by changing a digit.

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, 1101703 + ... + 1101738.

Almost surely, 2^39661938 is an apocalyptic number.

39661938 is an abundant number, since it is smaller than the sum of its proper divisors (46272300).

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

39661938 is a wasteful number, since it uses less digits than its factorization.

39661938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203449 (or 2203446 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 39661938 is about 6297.7724633397. The cubic root of 39661938 is about 341.0289991190.

The spelling of 39661938 in words is "thirty-nine million, six hundred sixty-one thousand, nine hundred thirty-eight".