39949930 has 8 divisors (see below), whose sum is σ = 71909892. Its totient is φ = 15979968.

The previous prime is 39949927. The next prime is 39949933. The reversal of 39949930 is 3994993.

It is an interprime number because it is at equal distance from previous prime (39949927) and next prime (39949933).

It can be written as a sum of positive squares in 2 ways, for example, as 38081241 + 1868689 = 6171^2 + 1367^2 .

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

It is not an unprimeable number, because it can be changed into a prime (39949933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1997487 + ... + 1997506.

Almost surely, 2^39949930 is an apocalyptic number.

39949930 is a deficient number, since it is larger than the sum of its proper divisors (31959962).

39949930 is a wasteful number, since it uses less digits than its factorization.

39949930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995000.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 39949930 is about 6320.5956997739. The cubic root of 39949930 is about 341.8524322606.

It can be divided in two parts, 3994 and 9930, that added together give a square (13924 = 118²).

The spelling of 39949930 in words is "thirty-nine million, nine hundred forty-nine thousand, nine hundred thirty".