1600223220 has 36 divisors (see below), whose sum is σ = 4854010980. Its totient is φ = 426726144.

The previous prime is 1600223189. The next prime is 1600223221. The reversal of 1600223220 is 223220061.

It can be written as a sum of positive squares in 2 ways, for example, as 314140176 + 1286083044 = 17724^2 + 35862^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1600223193 and 1600223202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600223221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4444885 + ... + 4445244.

Almost surely, 2^1600223220 is an apocalyptic number.

1600223220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1600223220 is an abundant number, since it is smaller than the sum of its proper divisors (3253787760).

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

1600223220 is a wasteful number, since it uses less digits than its factorization.

1600223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890144 (or 8890139 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1600223220 is about 40002.7901526881. The cubic root of 1600223220 is about 1169.6614843592.

Adding to 1600223220 its reverse (223220061), we get a palindrome (1823443281).

The spelling of 1600223220 in words is "one billion, six hundred million, two hundred twenty-three thousand, two hundred twenty".