3640222 has 4 divisors (see below), whose sum is σ = 5460336. Its totient is φ = 1820110.

The previous prime is 3640207. The next prime is 3640223. The reversal of 3640222 is 2220463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2220463 = 7 ⋅317209.

It is a self number, because there is not a number n which added to its sum of digits gives 3640222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910054 + ... + 910057.

It is an arithmetic number, because the mean of its divisors is an integer number (1365084).

Almost surely, 2^3640222 is an apocalyptic number.

3640222 is a deficient number, since it is larger than the sum of its proper divisors (1820114).

3640222 is a wasteful number, since it uses less digits than its factorization.

3640222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820113.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 3640222 is about 1907.9365817553. The cubic root of 3640222 is about 153.8305608171.

Adding to 3640222 its reverse (2220463), we get a palindrome (5860685).

The spelling of 3640222 in words is "three million, six hundred forty thousand, two hundred twenty-two".