3645222 has 32 divisors (see below), whose sum is σ = 8390400. Its totient is φ = 1034208.

The previous prime is 3645193. The next prime is 3645227. The reversal of 3645222 is 2225463.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3645192 and 3645201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645227) 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, 9429 + ... + 9807.

It is an arithmetic number, because the mean of its divisors is an integer number (262200).

Almost surely, 2^3645222 is an apocalyptic number.

3645222 is an abundant number, since it is smaller than the sum of its proper divisors (4745178).

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

3645222 is a wasteful number, since it uses less digits than its factorization.

3645222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its digits is 2880, while the sum is 24.

The square root of 3645222 is about 1909.2464482093. The cubic root of 3645222 is about 153.9009595380.

The spelling of 3645222 in words is "three million, six hundred forty-five thousand, two hundred twenty-two".