620811680 has 48 divisors (see below), whose sum is σ = 1480164840. Its totient is φ = 246039552.

The previous prime is 620811679. The next prime is 620811721. The reversal of 620811680 is 86118026.

620811680 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 431143696 + 189667984 = 20764^2 + 13772^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359 + ... + 35238.

Almost surely, 2^620811680 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 620811680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740082420).

620811680 is an abundant number, since it is smaller than the sum of its proper divisors (859353160).

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

620811680 is a wasteful number, since it uses less digits than its factorization.

620811680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35721 (or 35713 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 620811680 is about 24916.0927916076. The cubic root of 620811680 is about 853.0738441688.

The spelling of 620811680 in words is "six hundred twenty million, eight hundred eleven thousand, six hundred eighty".