39998320 has 20 divisors (see below), whose sum is σ = 92996280. Its totient is φ = 15999296.

The previous prime is 39998317. The next prime is 39998327. The reversal of 39998320 is 2389993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39998327) 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 3 ways as a sum of consecutive naturals, for example, 249910 + ... + 250069.

It is an arithmetic number, because the mean of its divisors is an integer number (4649814).

Almost surely, 2^39998320 is an apocalyptic number.

It is an amenable number.

39998320 is an abundant number, since it is smaller than the sum of its proper divisors (52997960).

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

39998320 is a wasteful number, since it uses less digits than its factorization.

39998320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499992 (or 499986 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 39998320 is about 6324.4225032804. The cubic root of 39998320 is about 341.9904013357.

The spelling of 39998320 in words is "thirty-nine million, nine hundred ninety-eight thousand, three hundred twenty".