3640562 has 4 divisors (see below), whose sum is σ = 5460846. Its totient is φ = 1820280.

The previous prime is 3640561. The next prime is 3640577. The reversal of 3640562 is 2650463.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3463321 + 177241 = 1861^2 + 421^2 .

It is a d-powerful number, because it can be written as 3² + 6⁵ + 4 + 0 + 5⁹ + 6⁸ + 2⁵ .

It is not an unprimeable number, because it can be changed into a prime (3640561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910139 + ... + 910142.

Almost surely, 2^3640562 is an apocalyptic number.

3640562 is a deficient number, since it is larger than the sum of its proper divisors (1820284).

3640562 is a wasteful number, since it uses less digits than its factorization.

3640562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820283.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3640562 is about 1908.0256811689. The cubic root of 3640562 is about 153.8353499721.

Subtracting from 3640562 its reverse (2650463), we obtain a palindrome (990099).

The spelling of 3640562 in words is "three million, six hundred forty thousand, five hundred sixty-two".