39838240 has 96 divisors (see below), whose sum is σ = 102876480. Its totient is φ = 14490624.

The previous prime is 39838229. The next prime is 39838241. The reversal of 39838240 is 4283893.

It is a self number, because there is not a number n which added to its sum of digits gives 39838240.

It is not an unprimeable number, because it can be changed into a prime (39838241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222471 + ... + 222649.

It is an arithmetic number, because the mean of its divisors is an integer number (1071630).

Almost surely, 2^39838240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39838240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51438240).

39838240 is an abundant number, since it is smaller than the sum of its proper divisors (63038240).

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

39838240 is a wasteful number, since it uses less digits than its factorization.

39838240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 39838240 is about 6311.7541143489. The cubic root of 39838240 is about 341.5335569793.

The spelling of 39838240 in words is "thirty-nine million, eight hundred thirty-eight thousand, two hundred forty".