39968838 has 72 divisors (see below), whose sum is σ = 107226288. Its totient is φ = 10535616.

The previous prime is 39968833. The next prime is 39968839. The reversal of 39968838 is 83886993.

It is a super-2 number, since 2×39968838² = 3195016022140488, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39968833) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20356 + ... + 22232.

It is an arithmetic number, because the mean of its divisors is an integer number (1489254).

Almost surely, 2^39968838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39968838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53613144).

39968838 is an abundant number, since it is smaller than the sum of its proper divisors (67257450).

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

39968838 is a wasteful number, since it uses less digits than its factorization.

39968838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1902 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 39968838 is about 6322.0912679271. The cubic root of 39968838 is about 341.9063558120.

The spelling of 39968838 in words is "thirty-nine million, nine hundred sixty-eight thousand, eight hundred thirty-eight".