1628220836 has 12 divisors (see below), whose sum is σ = 3108421680. Its totient is φ = 740100360.

The previous prime is 1628220829. The next prime is 1628220851. The reversal of 1628220836 is 6380228261.

It is a super-2 number, since 2×1628220836² = 5302206181569077792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1628220836.

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 3 ways as a sum of consecutive naturals, for example, 18502466 + ... + 18502553.

It is an arithmetic number, because the mean of its divisors is an integer number (259035140).

Almost surely, 2^1628220836 is an apocalyptic number.

It is an amenable number.

1628220836 is a deficient number, since it is larger than the sum of its proper divisors (1480200844).

1628220836 is a wasteful number, since it uses less digits than its factorization.

1628220836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37005034 (or 37005032 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 1628220836 is about 40351.2185193954. The cubic root of 1628220836 is about 1176.4435762067.

The spelling of 1628220836 in words is "one billion, six hundred twenty-eight million, two hundred twenty thousand, eight hundred thirty-six".