3645724 has 12 divisors (see below), whose sum is σ = 6586048. Its totient is φ = 1764000.

The previous prime is 3645713. The next prime is 3645727. The reversal of 3645724 is 4275463.

3645724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14577 + ... + 14824.

Almost surely, 2^3645724 is an apocalyptic number.

It is an amenable number.

3645724 is a deficient number, since it is larger than the sum of its proper divisors (2940324).

3645724 is a wasteful number, since it uses less digits than its factorization.

3645724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29436 (or 29434 counting only the distinct ones).

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

The square root of 3645724 is about 1909.3779091631. The cubic root of 3645724 is about 153.9080240126.

It can be divided in two parts, 36457 and 24, that added together give a square (36481 = 191²).

The spelling of 3645724 in words is "three million, six hundred forty-five thousand, seven hundred twenty-four".