39409340 has 12 divisors (see below), whose sum is σ = 82759656. Its totient is φ = 15763728.

The previous prime is 39409319. The next prime is 39409343. The reversal of 39409340 is 4390493.

It is a junction number, because it is equal to n+sod(n) for n = 39409297 and 39409306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39409343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985214 + ... + 985253.

It is an arithmetic number, because the mean of its divisors is an integer number (6896638).

Almost surely, 2^39409340 is an apocalyptic number.

It is an amenable number.

39409340 is an abundant number, since it is smaller than the sum of its proper divisors (43350316).

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

39409340 is a wasteful number, since it uses less digits than its factorization.

39409340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970476 (or 1970474 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 39409340 is about 6277.6858793667. The cubic root of 39409340 is about 340.3034775993.

The spelling of 39409340 in words is "thirty-nine million, four hundred nine thousand, three hundred forty".