3644725 has 24 divisors (see below), whose sum is σ = 5267520. Its totient is φ = 2449920.

The previous prime is 3644699. The next prime is 3644731. The reversal of 3644725 is 5274463.

It is not a de Polignac number, because 3644725 - 2⁹ = 3644213 is a prime.

It is a d-powerful number, because it can be written as 3³ + 6² + 4⁵ + 4¹⁰ + 7⁶ + 2¹⁹ + 5⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10149 + ... + 10501.

It is an arithmetic number, because the mean of its divisors is an integer number (219480).

Almost surely, 2^3644725 is an apocalyptic number.

3644725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3644725 is a deficient number, since it is larger than the sum of its proper divisors (1622795).

3644725 is a wasteful number, since it uses less digits than its factorization.

3644725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 424 counting only the distinct ones).

The product of its digits is 20160, while the sum is 31.

The square root of 3644725 is about 1909.1162877101. The cubic root of 3644725 is about 153.8939647876.

The spelling of 3644725 in words is "three million, six hundred forty-four thousand, seven hundred twenty-five".