620434660 has 48 divisors (see below), whose sum is σ = 1381911552. Its totient is φ = 233481600.

The previous prime is 620434657. The next prime is 620434663. The reversal of 620434660 is 66434026.

620434660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (620434657) and next prime (620434663).

It is not an unprimeable number, because it can be changed into a prime (620434663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17005 + ... + 39115.

It is an arithmetic number, because the mean of its divisors is an integer number (28789824).

Almost surely, 2^620434660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620434660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690955776).

620434660 is an abundant number, since it is smaller than the sum of its proper divisors (761476892).

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

620434660 is a wasteful number, since it uses less digits than its factorization.

620434660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22204 (or 22202 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 620434660 is about 24908.5258495962. The cubic root of 620434660 is about 852.9011181280.

Adding to 620434660 its reverse (66434026), we get a palindrome (686868686).

The spelling of 620434660 in words is "six hundred twenty million, four hundred thirty-four thousand, six hundred sixty".