39903216 has 80 divisors (see below), whose sum is σ = 110707200. Its totient is φ = 12340224.

The previous prime is 39903203. The next prime is 39903221. The reversal of 39903216 is 61230993.

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, 64155 + ... + 64773.

It is an arithmetic number, because the mean of its divisors is an integer number (1383840).

Almost surely, 2^39903216 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 39903216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55353600).

39903216 is an abundant number, since it is smaller than the sum of its proper divisors (70803984).

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

39903216 is a wasteful number, since it uses less digits than its factorization.

39903216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 39903216 is about 6316.8992393420. The cubic root of 39903216 is about 341.7191360493.

The spelling of 39903216 in words is "thirty-nine million, nine hundred three thousand, two hundred sixteen".