39909704 has 8 divisors (see below), whose sum is σ = 74830710. Its totient is φ = 19954848.

The previous prime is 39909703. The next prime is 39909733. The reversal of 39909704 is 40790993.

It can be written as a sum of positive squares in only one way, i.e., 21436900 + 18472804 = 4630^2 + 4298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (39909703) 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 as a sum of consecutive naturals, namely, 2494349 + ... + 2494364.

Almost surely, 2^39909704 is an apocalyptic number.

It is an amenable number.

39909704 is a deficient number, since it is larger than the sum of its proper divisors (34921006).

39909704 is a wasteful number, since it uses less digits than its factorization.

39909704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988719 (or 4988715 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 39909704 is about 6317.4127615662. The cubic root of 39909704 is about 341.7376554722.

The spelling of 39909704 in words is "thirty-nine million, nine hundred nine thousand, seven hundred four".