39999958 has 8 divisors (see below), whose sum is σ = 60032952. Its totient is φ = 19988976.

The previous prime is 39999943. The next prime is 39999979. The reversal of 39999958 is 85999993.

39999958 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 39999896 and 39999905.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 241 + ... + 8947.

It is an arithmetic number, because the mean of its divisors is an integer number (7504119).

Almost surely, 2^39999958 is an apocalyptic number.

39999958 is a deficient number, since it is larger than the sum of its proper divisors (20032994).

39999958 is a wasteful number, since it uses less digits than its factorization.

39999958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11006.

The product of its digits is 7085880, while the sum is 61.

The square root of 39999958 is about 6324.5519999443. The cubic root of 39999958 is about 341.9950696370.

The spelling of 39999958 in words is "thirty-nine million, nine hundred ninety-nine thousand, nine hundred fifty-eight".