620304630 has 128 divisors (see below), whose sum is σ = 1687827456. Its totient is φ = 144576000.

The previous prime is 620304623. The next prime is 620304689. The reversal of 620304630 is 36403026.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 620304630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1232959 + ... + 1233461.

It is an arithmetic number, because the mean of its divisors is an integer number (13186152).

Almost surely, 2^620304630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620304630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843913728).

620304630 is an abundant number, since it is smaller than the sum of its proper divisors (1067522826).

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

620304630 is a wasteful number, since it uses less digits than its factorization.

620304630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 620304630 is about 24905.9155623719. The cubic root of 620304630 is about 852.8415306119.

Adding to 620304630 its reverse (36403026), we get a palindrome (656707656).

The spelling of 620304630 in words is "six hundred twenty million, three hundred four thousand, six hundred thirty".