1641622228 has 12 divisors (see below), whose sum is σ = 2893809492. Its totient is φ = 814819520.

The previous prime is 1641622201. The next prime is 1641622273. The reversal of 1641622228 is 8222261461.

It can be written as a sum of positive squares in 2 ways, for example, as 1185287184 + 456335044 = 34428^2 + 21362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1641622193 and 1641622202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1497283 + ... + 1498378.

It is an arithmetic number, because the mean of its divisors is an integer number (241150791).

Almost surely, 2^1641622228 is an apocalyptic number.

It is an amenable number.

1641622228 is a deficient number, since it is larger than the sum of its proper divisors (1252187264).

1641622228 is a wasteful number, since it uses less digits than its factorization.

1641622228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995802 (or 2995800 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 1641622228 is about 40516.9375446862. The cubic root of 1641622228 is about 1179.6624113278.

Adding to 1641622228 its reverse (8222261461), we get a palindrome (9863883689).

The spelling of 1641622228 in words is "one billion, six hundred forty-one million, six hundred twenty-two thousand, two hundred twenty-eight".