3635604 has 90 divisors (see below), whose sum is σ = 11104170. Its totient is φ = 1034208.

The previous prime is 3635581. The next prime is 3635617. The reversal of 3635604 is 4065363.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 63504 = 1890^2 + 252^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 15762 + ... + 15990.

Almost surely, 2^3635604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3635604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5552085).

3635604 is an abundant number, since it is smaller than the sum of its proper divisors (7468566).

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

3635604 is a wasteful number, since it uses less digits than its factorization.

3635604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 3635604 is about 1906.7259897531. The cubic root of 3635604 is about 153.7654832712.

The spelling of 3635604 in words is "three million, six hundred thirty-five thousand, six hundred four".