3645630 has 24 divisors (see below), whose sum is σ = 9478872. Its totient is φ = 972144.

The previous prime is 3645623. The next prime is 3645643. The reversal of 3645630 is 365463.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3645594 and 3645603.

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 11 ways as a sum of consecutive naturals, for example, 20164 + ... + 20343.

It is an arithmetic number, because the mean of its divisors is an integer number (394953).

Almost surely, 2^3645630 is an apocalyptic number.

3645630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3645630 is an abundant number, since it is smaller than the sum of its proper divisors (5833242).

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

3645630 is a wasteful number, since it uses less digits than its factorization.

3645630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40520 (or 40517 counting only the distinct ones).

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

The square root of 3645630 is about 1909.3532936573. The cubic root of 3645630 is about 153.9067012321.

The spelling of 3645630 in words is "three million, six hundred forty-five thousand, six hundred thirty".