39870012 has 96 divisors (see below), whose sum is σ = 118540800. Its totient is φ = 10144512.

The previous prime is 39869969. The next prime is 39870013. The reversal of 39870012 is 21007893.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39870013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31039 + ... + 32297.

It is an arithmetic number, because the mean of its divisors is an integer number (1234800).

Almost surely, 2^39870012 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 39870012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59270400).

39870012 is an abundant number, since it is smaller than the sum of its proper divisors (78670788).

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

39870012 is a wasteful number, since it uses less digits than its factorization.

39870012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 39870012 is about 6314.2705041834. The cubic root of 39870012 is about 341.6243267251.

The spelling of 39870012 in words is "thirty-nine million, eight hundred seventy thousand, twelve".