3645774 has 24 divisors (see below), whose sum is σ = 8617752. Its totient is φ = 1104720.

The previous prime is 3645773. The next prime is 3645781. The reversal of 3645774 is 4775463.

3645774 is a `hidden beast` number, since 3 + 645 + 7 + 7 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9009 + ... + 9404.

It is an arithmetic number, because the mean of its divisors is an integer number (359073).

Almost surely, 2^3645774 is an apocalyptic number.

3645774 is an abundant number, since it is smaller than the sum of its proper divisors (4971978).

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

3645774 is a wasteful number, since it uses less digits than its factorization.

3645774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18432 (or 18429 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 3645774 is about 1909.3910023879. The cubic root of 3645774 is about 153.9087276101.

The spelling of 3645774 in words is "three million, six hundred forty-five thousand, seven hundred seventy-four".