1600720220 has 24 divisors (see below), whose sum is σ = 3667105008. Its totient is φ = 582080000.

The previous prime is 1600720211. The next prime is 1600720223. The reversal of 1600720220 is 220270061.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1600720192 and 1600720201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600720223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3637781 + ... + 3638220.

It is an arithmetic number, because the mean of its divisors is an integer number (152796042).

Almost surely, 2^1600720220 is an apocalyptic number.

1600720220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1600720220 is an abundant number, since it is smaller than the sum of its proper divisors (2066384788).

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

1600720220 is a wasteful number, since it uses less digits than its factorization.

1600720220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276021 (or 7276019 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1600720220 is about 40009.0017371091. The cubic root of 1600720220 is about 1169.7825636308.

Adding to 1600720220 its reverse (220270061), we get a palindrome (1820990281).

The spelling of 1600720220 in words is "one billion, six hundred million, seven hundred twenty thousand, two hundred twenty".