220240644 has 48 divisors (see below), whose sum is σ = 585986688. Its totient is φ = 63779328.

The previous prime is 220240607. The next prime is 220240649. The reversal of 220240644 is 446042022.

It is not an unprimeable number, because it can be changed into a prime (220240649) 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, 38872 + ... + 44175.

It is an arithmetic number, because the mean of its divisors is an integer number (12208056).

Almost surely, 2^220240644 is an apocalyptic number.

It is an amenable number.

220240644 is an abundant number, since it is smaller than the sum of its proper divisors (365746044).

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

220240644 is a wasteful number, since it uses less digits than its factorization.

220240644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83084 (or 83082 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 220240644 is about 14840.5068646593. The cubic root of 220240644 is about 603.9011029107.

Adding to 220240644 its reverse (446042022), we get a palindrome (666282666).

The spelling of 220240644 in words is "two hundred twenty million, two hundred forty thousand, six hundred forty-four".