39873856 has 84 divisors (see below), whose sum is σ = 91887040. Its totient is φ = 17107200.

The previous prime is 39873839. The next prime is 39873859. The reversal of 39873856 is 65837893.

Its product of digits (1088640) is a multiple of the sum of its prime factors (324).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39873859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147001 + ... + 147271.

Almost surely, 2^39873856 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 39873856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45943520).

39873856 is an abundant number, since it is smaller than the sum of its proper divisors (52013184).

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

39873856 is a wasteful number, since it uses less digits than its factorization.

39873856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 303 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 39873856 is about 6314.5748867204. The cubic root of 39873856 is about 341.6353054168.

The spelling of 39873856 in words is "thirty-nine million, eight hundred seventy-three thousand, eight hundred fifty-six".