39949918 has 8 divisors (see below), whose sum is σ = 60006312. Its totient is φ = 19947816.

The previous prime is 39949909. The next prime is 39949927. The reversal of 39949918 is 81994993.

39949918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39949909) and next prime (39949927).

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

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, 11680 + ... + 14707.

It is an arithmetic number, because the mean of its divisors is an integer number (7500789).

Almost surely, 2^39949918 is an apocalyptic number.

39949918 is the 3379-th centered heptagonal number.

39949918 is a deficient number, since it is larger than the sum of its proper divisors (20056394).

39949918 is a wasteful number, since it uses less digits than its factorization.

39949918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27146.

The product of its digits is 629856, while the sum is 52.

The square root of 39949918 is about 6320.5947504962. The cubic root of 39949918 is about 341.8523980325.

The spelling of 39949918 in words is "thirty-nine million, nine hundred forty-nine thousand, nine hundred eighteen".