320220100 has 18 divisors (see below), whose sum is σ = 694877834. Its totient is φ = 128088000.

The previous prime is 320220083. The next prime is 320220119. The reversal of 320220100 is 1022023.

It can be written as a sum of positive squares in 3 ways, for example, as 42797764 + 277422336 = 6542^2 + 16656^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 1601001 + ... + 1601200.

Almost surely, 2^320220100 is an apocalyptic number.

It is an amenable number.

320220100 is an abundant number, since it is smaller than the sum of its proper divisors (374657734).

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

320220100 is a wasteful number, since it uses less digits than its factorization.

320220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202215 (or 3202208 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 320220100 is about 17894.6947445325. The cubic root of 320220100 is about 684.1471617745.

Adding to 320220100 its reverse (1022023), we get a palindrome (321242123).

The spelling of 320220100 in words is "three hundred twenty million, two hundred twenty thousand, one hundred".