39385640 has 32 divisors (see below), whose sum is σ = 101278080. Its totient is φ = 13503552.

The previous prime is 39385639. The next prime is 39385663. The reversal of 39385640 is 4658393.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 39385594 and 39385603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70052 + ... + 70611.

It is an arithmetic number, because the mean of its divisors is an integer number (3164940).

Almost surely, 2^39385640 is an apocalyptic number.

It is an amenable number.

39385640 is an abundant number, since it is smaller than the sum of its proper divisors (61892440).

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

39385640 is a wasteful number, since it uses less digits than its factorization.

39385640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140681 (or 140677 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 39385640 is about 6275.7979572322. The cubic root of 39385640 is about 340.2352466528.

The spelling of 39385640 in words is "thirty-nine million, three hundred eighty-five thousand, six hundred forty".