39947648 has 32 divisors (see below), whose sum is σ = 85708560. Its totient is φ = 18436608.

The previous prime is 39947599. The next prime is 39947657. The reversal of 39947648 is 84674993.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 39947596 and 39947605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10340 + ... + 13667.

Almost surely, 2^39947648 is an apocalyptic number.

It is an amenable number.

39947648 is an abundant number, since it is smaller than the sum of its proper divisors (45760912).

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

39947648 is a wasteful number, since it uses less digits than its factorization.

39947648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24034 (or 24022 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 39947648 is about 6320.4151762364. The cubic root of 39947648 is about 341.8459230952.

The spelling of 39947648 in words is "thirty-nine million, nine hundred forty-seven thousand, six hundred forty-eight".