3645756 has 24 divisors (see below), whose sum is σ = 9452240. Its totient is φ = 1215216.

The previous prime is 3645749. The next prime is 3645767. The reversal of 3645756 is 6575463.

3645756 is a `hidden beast` number, since 3 + 645 + 7 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3645756.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16771 + ... + 16986.

Almost surely, 2^3645756 is an apocalyptic number.

3645756 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3645756 is an abundant number, since it is smaller than the sum of its proper divisors (5806484).

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

3645756 is a wasteful number, since it uses less digits than its factorization.

3645756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33770 (or 33762 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 3645756 is about 1909.3862888373. The cubic root of 3645756 is about 153.9084743157.

The spelling of 3645756 in words is "three million, six hundred forty-five thousand, seven hundred fifty-six".