3645856 has 12 divisors (see below), whose sum is σ = 7177842. Its totient is φ = 1822912.

The previous prime is 3645823. The next prime is 3645877. The reversal of 3645856 is 6585463.

It can be written as a sum of positive squares in only one way, i.e., 2835856 + 810000 = 1684^2 + 900^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56935 + ... + 56998.

Almost surely, 2^3645856 is an apocalyptic number.

It is an amenable number.

3645856 is a deficient number, since it is larger than the sum of its proper divisors (3531986).

3645856 is a wasteful number, since it uses less digits than its factorization.

3645856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113943 (or 113935 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 3645856 is about 1909.4124750823. The cubic root of 3645856 is about 153.9098814959.

The spelling of 3645856 in words is "three million, six hundred forty-five thousand, eight hundred fifty-six".