620128630 has 24 divisors (see below), whose sum is σ = 1226934576. Its totient is φ = 225500880.

The previous prime is 620128609. The next prime is 620128637. The reversal of 620128630 is 36821026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620128637) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 255042 + ... + 257461.

It is an arithmetic number, because the mean of its divisors is an integer number (51122274).

Almost surely, 2^620128630 is an apocalyptic number.

620128630 is a deficient number, since it is larger than the sum of its proper divisors (606805946).

620128630 is a wasteful number, since it uses less digits than its factorization.

620128630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512532 (or 512521 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 620128630 is about 24902.3820145784. The cubic root of 620128630 is about 852.7608636297.

Adding to 620128630 its reverse (36821026), we get a palindrome (656949656).

The spelling of 620128630 in words is "six hundred twenty million, one hundred twenty-eight thousand, six hundred thirty".