1628361226 has 4 divisors (see below), whose sum is σ = 2442541842. Its totient is φ = 814180612.

The previous prime is 1628361209. The next prime is 1628361227. The reversal of 1628361226 is 6221638261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1588102201 + 40259025 = 39851^2 + 6345^2 .

It is not an unprimeable number, because it can be changed into a prime (1628361227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407090305 + ... + 407090308.

Almost surely, 2^1628361226 is an apocalyptic number.

1628361226 is a deficient number, since it is larger than the sum of its proper divisors (814180616).

1628361226 is an equidigital number, since it uses as much as digits as its factorization.

1628361226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814180615.

The product of its digits is 41472, while the sum is 37.

The square root of 1628361226 is about 40352.9580824008. The cubic root of 1628361226 is about 1176.4773873792.

Adding to 1628361226 its reverse (6221638261), we get a palindrome (7849999487).

The spelling of 1628361226 in words is "one billion, six hundred twenty-eight million, three hundred sixty-one thousand, two hundred twenty-six".