43604 has 12 divisors (see below), whose sum is σ = 83328. Its totient is φ = 19800.

The previous prime is 43597. The next prime is 43607. The reversal of 43604 is 40634.

It is a nialpdrome in base 4 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452 + ... + 539.

It is an arithmetic number, because the mean of its divisors is an integer number (6944).

2⁴³⁶⁰⁴ is an apocalyptic number.

43604 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

43604 is a deficient number, since it is larger than the sum of its proper divisors (39724).

43604 is a wasteful number, since it uses less digits than its factorization.

43604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 43604 is about 208.8157082214. The cubic root of 43604 is about 35.1972535736.

The spelling of 43604 in words is "forty-three thousand, six hundred four".