3645736 has 8 divisors (see below), whose sum is σ = 6835770. Its totient is φ = 1822864.

The previous prime is 3645731. The next prime is 3645737. The reversal of 3645736 is 6375463.

It can be written as a sum of positive squares in only one way, i.e., 2220100 + 1425636 = 1490^2 + 1194^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×3645736³ (a number of 21 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (3645731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227851 + ... + 227866.

Almost surely, 2^3645736 is an apocalyptic number.

It is an amenable number.

3645736 is a deficient number, since it is larger than the sum of its proper divisors (3190034).

3645736 is a wasteful number, since it uses less digits than its factorization.

3645736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455723 (or 455719 counting only the distinct ones).

The product of its digits is 45360, while the sum is 34.

The square root of 3645736 is about 1909.3810515452. The cubic root of 3645736 is about 153.9081928766.

The spelling of 3645736 in words is "three million, six hundred forty-five thousand, seven hundred thirty-six".