220408646 has 4 divisors (see below), whose sum is σ = 330612972. Its totient is φ = 110204322.

The previous prime is 220408603. The next prime is 220408649. The reversal of 220408646 is 646804022.

It is a happy number.

220408646 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220408649) 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, 55102160 + ... + 55102163.

It is an arithmetic number, because the mean of its divisors is an integer number (82653243).

Almost surely, 2^220408646 is an apocalyptic number.

220408646 is a deficient number, since it is larger than the sum of its proper divisors (110204326).

220408646 is a wasteful number, since it uses less digits than its factorization.

220408646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110204325.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 220408646 is about 14846.1660370616. The cubic root of 220408646 is about 604.0546180306.

The spelling of 220408646 in words is "two hundred twenty million, four hundred eight thousand, six hundred forty-six".