39604 has 6 divisors (see below), whose sum is σ = 69314. Its totient is φ = 19800.

The previous prime is 39581. The next prime is 39607. The reversal of 39604 is 40693.

39604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 39204 + 400 = 198^2 + 20^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4947 + ... + 4954.

2³⁹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

39604 is a deficient number, since it is larger than the sum of its proper divisors (29710).

39604 is a wasteful number, since it uses less digits than its factorization.

39604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9905 (or 9903 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 39604 is about 199.0075375457. The cubic root of 39604 is about 34.0862860263.

Subtracting 39604 from its reverse (40693), we obtain a square (1089 = 33²).

The spelling of 39604 in words is "thirty-nine thousand, six hundred four".