620640160 has 96 divisors (see below), whose sum is σ = 1698907392. Its totient is φ = 209848320.

The previous prime is 620640133. The next prime is 620640173. The reversal of 620640160 is 61046026.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77965 + ... + 85555.

It is an arithmetic number, because the mean of its divisors is an integer number (17696952).

Almost surely, 2^620640160 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 620640160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849453696).

620640160 is an abundant number, since it is smaller than the sum of its proper divisors (1078267232).

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

620640160 is a wasteful number, since it uses less digits than its factorization.

620640160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7686 (or 7678 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 620640160 is about 24912.6506016522. The cubic root of 620640160 is about 852.9952735342.

Adding to 620640160 its reverse (61046026), we get a palindrome (681686186).

The spelling of 620640160 in words is "six hundred twenty million, six hundred forty thousand, one hundred sixty".