3644217 has 16 divisors (see below), whose sum is σ = 5477760. Its totient is φ = 2394000.

The previous prime is 3644213. The next prime is 3644231. The reversal of 3644217 is 7124463.

3644217 is a `hidden beast` number, since 3 + 644 + 2 + 17 = 666.

It is not a de Polignac number, because 3644217 - 2² = 3644213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3644213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967 + ... + 2867.

It is an arithmetic number, because the mean of its divisors is an integer number (342360).

Almost surely, 2^3644217 is an apocalyptic number.

It is an amenable number.

3644217 is a deficient number, since it is larger than the sum of its proper divisors (1833543).

3644217 is a wasteful number, since it uses less digits than its factorization.

3644217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981 (or 1975 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 3644217 is about 1908.9832372234. The cubic root of 3644217 is about 153.8868145667.

It can be divided in two parts, 36 and 44217, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 3644217 in words is "three million, six hundred forty-four thousand, two hundred seventeen".