39390312 has 64 divisors (see below), whose sum is σ = 106767360. Its totient is φ = 12038400.

The previous prime is 39390301. The next prime is 39390317. The reversal of 39390312 is 21309393.

It is a self number, because there is not a number n which added to its sum of digits gives 39390312.

It is not an unprimeable number, because it can be changed into a prime (39390317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59262 + ... + 59922.

It is an arithmetic number, because the mean of its divisors is an integer number (1668240).

Almost surely, 2^39390312 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 39390312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53383680).

39390312 is an abundant number, since it is smaller than the sum of its proper divisors (67377048).

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

39390312 is a wasteful number, since it uses less digits than its factorization.

39390312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 39390312 is about 6276.1701697771. The cubic root of 39390312 is about 340.2486992396.

The spelling of 39390312 in words is "thirty-nine million, three hundred ninety thousand, three hundred twelve".