39998416 has 40 divisors (see below), whose sum is σ = 82494720. Its totient is φ = 18722304.

The previous prime is 39998393. The next prime is 39998423. The reversal of 39998416 is 61489993.

It is a self number, because there is not a number n which added to its sum of digits gives 39998416.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 83265 + ... + 83743.

It is an arithmetic number, because the mean of its divisors is an integer number (2062368).

Almost surely, 2^39998416 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 39998416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41247360).

39998416 is an abundant number, since it is smaller than the sum of its proper divisors (42496304).

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

39998416 is a wasteful number, since it uses less digits than its factorization.

39998416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 805 counting only the distinct ones).

The product of its digits is 419904, while the sum is 49.

The square root of 39998416 is about 6324.4300929017. The cubic root of 39998416 is about 341.9906749392.

The spelling of 39998416 in words is "thirty-nine million, nine hundred ninety-eight thousand, four hundred sixteen".