39998830 has 16 divisors (see below), whose sum is σ = 74481120. Its totient is φ = 15447712.

The previous prime is 39998797. The next prime is 39998831. The reversal of 39998830 is 3889993.

39998830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39998831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68674 + ... + 69253.

It is an arithmetic number, because the mean of its divisors is an integer number (4655070).

Almost surely, 2^39998830 is an apocalyptic number.

39998830 is a deficient number, since it is larger than the sum of its proper divisors (34482290).

39998830 is a wasteful number, since it uses less digits than its factorization.

39998830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137963.

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

The square root of 39998830 is about 6324.4628230388. The cubic root of 39998830 is about 341.9918548497.

The spelling of 39998830 in words is "thirty-nine million, nine hundred ninety-eight thousand, eight hundred thirty".