2228130920 has 32 divisors (see below), whose sum is σ = 5024305800. Its totient is φ = 889294848.

The previous prime is 2228130913. The next prime is 2228130943. The reversal of 2228130920 is 290318222.

It can be written as a sum of positive squares in 4 ways, for example, as 1523653156 + 704477764 = 39034^2 + 26542^2 .

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 7 ways as a sum of consecutive naturals, for example, 42665 + ... + 79224.

Almost surely, 2^2228130920 is an apocalyptic number.

2228130920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2228130920 is an abundant number, since it is smaller than the sum of its proper divisors (2796174880).

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

2228130920 is a wasteful number, since it uses less digits than its factorization.

2228130920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122357 (or 122353 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 2228130920 is about 47203.0816790599. The cubic root of 2228130920 is about 1306.1114452980. Note that the first 3 decimals are identical.

The spelling of 2228130920 in words is "two billion, two hundred twenty-eight million, one hundred thirty thousand, nine hundred twenty".