620206650 has 144 divisors (see below), whose sum is σ = 1912966848. Its totient is φ = 141120000.

The previous prime is 620206649. The next prime is 620206663. The reversal of 620206650 is 56602026.

620206650 is a `hidden beast` number, since 6 + 2 + 0 + 2 + 0 + 6 + 650 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1262905 + ... + 1263395.

It is an arithmetic number, because the mean of its divisors is an integer number (13284492).

Almost surely, 2^620206650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620206650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956483424).

620206650 is an abundant number, since it is smaller than the sum of its proper divisors (1292760198).

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

620206650 is a wasteful number, since it uses less digits than its factorization.

620206650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 620206650 is about 24903.9484821183. The cubic root of 620206650 is about 852.7966248193.

Adding to 620206650 its reverse (56602026), we get a palindrome (676808676).

The spelling of 620206650 in words is "six hundred twenty million, two hundred six thousand, six hundred fifty".