39999312 has 80 divisors (see below), whose sum is σ = 117046080. Its totient is φ = 13074048.

The previous prime is 39999307. The next prime is 39999319. The reversal of 39999312 is 21399993.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39999319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22023 + ... + 23769.

It is an arithmetic number, because the mean of its divisors is an integer number (1463076).

Almost surely, 2^39999312 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 39999312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58523040).

39999312 is an abundant number, since it is smaller than the sum of its proper divisors (77046768).

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

39999312 is a wasteful number, since it uses less digits than its factorization.

39999312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817 (or 1805 counting only the distinct ones).

The product of its digits is 118098, while the sum is 45.

The square root of 39999312 is about 6324.5009289271. The cubic root of 39999312 is about 341.9932285517.

The spelling of 39999312 in words is "thirty-nine million, nine hundred ninety-nine thousand, three hundred twelve".