620120329920 has 672 divisors, whose sum is σ = 2661219480192. Its totient is φ = 129042284544.

The previous prime is 620120329909. The next prime is 620120329943. The reversal of 620120329920 is 29923021026.

620120329920 is a `hidden beast` number, since 620 + 1 + 2 + 0 + 3 + 2 + 9 + 9 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19115634 + ... + 19148046.

It is an arithmetic number, because the mean of its divisors is an integer number (3960148036).

Almost surely, 2^620120329920 is an apocalyptic number.

620120329920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620120329920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330609740096).

620120329920 is an abundant number, since it is smaller than the sum of its proper divisors (2041099150272).

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

620120329920 is a wasteful number, since it uses less digits than its factorization.

620120329920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32529 (or 32516 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 620120329920 in words is "six hundred twenty billion, one hundred twenty million, three hundred twenty-nine thousand, nine hundred twenty".