220445384 has 8 divisors (see below), whose sum is σ = 413335110. Its totient is φ = 110222688.

The previous prime is 220445383. The next prime is 220445389. The reversal of 220445384 is 483544022.

220445384 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 174504100 + 45941284 = 13210^2 + 6778^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 220445384.

It is not an unprimeable number, because it can be changed into a prime (220445383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13777829 + ... + 13777844.

Almost surely, 2^220445384 is an apocalyptic number.

It is an amenable number.

220445384 is a deficient number, since it is larger than the sum of its proper divisors (192889726).

220445384 is a wasteful number, since it uses less digits than its factorization.

220445384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27555679 (or 27555675 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

The square root of 220445384 is about 14847.4032746471. The cubic root of 220445384 is about 604.0881777028.

The spelling of 220445384 in words is "two hundred twenty million, four hundred forty-five thousand, three hundred eighty-four".