39648728 has 32 divisors (see below), whose sum is σ = 85363200. Its totient is φ = 16912032.

The previous prime is 39648677. The next prime is 39648733. The reversal of 39648728 is 82784693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11153 + ... + 14271.

It is an arithmetic number, because the mean of its divisors is an integer number (2667600).

Almost surely, 2^39648728 is an apocalyptic number.

It is an amenable number.

39648728 is an abundant number, since it is smaller than the sum of its proper divisors (45714472).

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

39648728 is a wasteful number, since it uses less digits than its factorization.

39648728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359 (or 3355 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 39648728 is about 6296.7235924725. The cubic root of 39648728 is about 340.9911333166.

The spelling of 39648728 in words is "thirty-nine million, six hundred forty-eight thousand, seven hundred twenty-eight".