620909850 has 192 divisors, whose sum is σ = 1771315200. Its totient is φ = 142560000.

The previous prime is 620909813. The next prime is 620909851. The reversal of 620909850 is 58909026.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 620909799 and 620909808.

It is not an unprimeable number, because it can be changed into a prime (620909851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3120051 + ... + 3120249.

It is an arithmetic number, because the mean of its divisors is an integer number (9225600).

Almost surely, 2^620909850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620909850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885657600).

620909850 is an abundant number, since it is smaller than the sum of its proper divisors (1150405350).

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

620909850 is a wasteful number, since it uses less digits than its factorization.

620909850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 620909850 is about 24918.0627256615. The cubic root of 620909850 is about 853.1188078017.

The spelling of 620909850 in words is "six hundred twenty million, nine hundred nine thousand, eight hundred fifty".