39947152 has 80 divisors (see below), whose sum is σ = 93744000. Its totient is φ = 16464000.

The previous prime is 39947137. The next prime is 39947191. The reversal of 39947152 is 25174993.

It is a super-2 number, since 2×39947152² = 3191549905822208, which contains 22 as substring.

It is a zygodrome in base 7.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159027 + ... + 159277.

It is an arithmetic number, because the mean of its divisors is an integer number (1171800).

Almost surely, 2^39947152 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 39947152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46872000).

39947152 is an abundant number, since it is smaller than the sum of its proper divisors (53796848).

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

39947152 is a wasteful number, since it uses less digits than its factorization.

39947152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 289 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 39947152 is about 6320.3759381860. The cubic root of 39947152 is about 341.8445082745.

The spelling of 39947152 in words is "thirty-nine million, nine hundred forty-seven thousand, one hundred fifty-two".