620857968 has 80 divisors (see below), whose sum is σ = 1649894400. Its totient is φ = 201081088.

The previous prime is 620857961. The next prime is 620857997. The reversal of 620857968 is 869758026.

It is a self number, because there is not a number n which added to its sum of digits gives 620857968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620857961) 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, 335221 + ... + 337067.

It is an arithmetic number, because the mean of its divisors is an integer number (20623680).

Almost surely, 2^620857968 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 620857968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824947200).

620857968 is an abundant number, since it is smaller than the sum of its proper divisors (1029036432).

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

620857968 is a wasteful number, since it uses less digits than its factorization.

620857968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054 (or 2048 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 620857968 is about 24917.0216518748. The cubic root of 620857968 is about 853.0950454993.

The spelling of 620857968 in words is "six hundred twenty million, eight hundred fifty-seven thousand, nine hundred sixty-eight".