39957340 has 12 divisors (see below), whose sum is σ = 83910456. Its totient is φ = 15982928.

The previous prime is 39957311. The next prime is 39957343. The reversal of 39957340 is 4375993.

39957340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 39957293 and 39957302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39957343) 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 3 ways as a sum of consecutive naturals, for example, 998914 + ... + 998953.

It is an arithmetic number, because the mean of its divisors is an integer number (6992538).

Almost surely, 2^39957340 is an apocalyptic number.

It is an amenable number.

39957340 is an abundant number, since it is smaller than the sum of its proper divisors (43953116).

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

39957340 is a wasteful number, since it uses less digits than its factorization.

39957340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997876 (or 1997874 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 39957340 is about 6321.1818515211. The cubic root of 39957340 is about 341.8735667985.

The spelling of 39957340 in words is "thirty-nine million, nine hundred fifty-seven thousand, three hundred forty".