39665004 has 12 divisors (see below), whose sum is σ = 92551704. Its totient is φ = 13221664.

The previous prime is 39664987. The next prime is 39665009. The reversal of 39665004 is 40056693.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (39665009) 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, 1652697 + ... + 1652720.

It is an arithmetic number, because the mean of its divisors is an integer number (7712642).

Almost surely, 2^39665004 is an apocalyptic number.

It is an amenable number.

39665004 is an abundant number, since it is smaller than the sum of its proper divisors (52886700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39665004 is a wasteful number, since it uses less digits than its factorization.

39665004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305424 (or 3305422 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 39665004 is about 6298.0158780365. The cubic root of 39665004 is about 341.0377864520.

The spelling of 39665004 in words is "thirty-nine million, six hundred sixty-five thousand, four".