39391328 has 24 divisors (see below), whose sum is σ = 80055360. Its totient is φ = 19059840.

The previous prime is 39391327. The next prime is 39391337. The reversal of 39391328 is 82319393.

It is a junction number, because it is equal to n+sod(n) for n = 39391291 and 39391300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39391327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18863 + ... + 20846.

It is an arithmetic number, because the mean of its divisors is an integer number (3335640).

Almost surely, 2^39391328 is an apocalyptic number.

It is an amenable number.

39391328 is an abundant number, since it is smaller than the sum of its proper divisors (40664032).

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

39391328 is a wasteful number, since it uses less digits than its factorization.

39391328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39750 (or 39742 counting only the distinct ones).

The product of its digits is 34992, while the sum is 38.

The square root of 39391328 is about 6276.2511103365. The cubic root of 39391328 is about 340.2516245757.

The spelling of 39391328 in words is "thirty-nine million, three hundred ninety-one thousand, three hundred twenty-eight".