1628220829 has 2 divisors, whose sum is σ = 1628220830. Its totient is φ = 1628220828.

The previous prime is 1628220799. The next prime is 1628220851. The reversal of 1628220829 is 9280228261.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1489805604 + 138415225 = 38598^2 + 11765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1628220829 - 2¹⁵ = 1628188061 is a prime.

It is a super-2 number, since 2×1628220829² = 5302206135978894482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1628220791 and 1628220800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1628220229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814110414 + 814110415.

It is an arithmetic number, because the mean of its divisors is an integer number (814110415).

Almost surely, 2^1628220829 is an apocalyptic number.

It is an amenable number.

1628220829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628220829 is an equidigital number, since it uses as much as digits as its factorization.

1628220829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1628220829 is about 40351.2184326570. The cubic root of 1628220829 is about 1176.4435745208.

The spelling of 1628220829 in words is "one billion, six hundred twenty-eight million, two hundred twenty thousand, eight hundred twenty-nine".