39986712 has 48 divisors (see below), whose sum is σ = 109175040. Its totient is φ = 13220928.

The previous prime is 39986693. The next prime is 39986717. The reversal of 39986712 is 21768993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39986717) 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, 6958 + ... + 11330.

It is an arithmetic number, because the mean of its divisors is an integer number (2274480).

Almost surely, 2^39986712 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 39986712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54587520).

39986712 is an abundant number, since it is smaller than the sum of its proper divisors (69188328).

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

39986712 is a wasteful number, since it uses less digits than its factorization.

39986712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512 (or 4505 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 39986712 is about 6323.5047244388. The cubic root of 39986712 is about 341.9573148738.

The spelling of 39986712 in words is "thirty-nine million, nine hundred eighty-six thousand, seven hundred twelve".