620868992 has 64 divisors (see below), whose sum is σ = 1332495360. Its totient is φ = 287316480.

The previous prime is 620868971. The next prime is 620869001. The reversal of 620868992 is 299868026.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 620868992.

It is a congruent number.

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, 87863 + ... + 94665.

It is an arithmetic number, because the mean of its divisors is an integer number (20820240).

Almost surely, 2^620868992 is an apocalyptic number.

620868992 is a gapful number since it is divisible by the number (62) 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 620868992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (666247680).

620868992 is an abundant number, since it is smaller than the sum of its proper divisors (711626368).

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

620868992 is a wasteful number, since it uses less digits than its factorization.

620868992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871 (or 6859 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 620868992 is about 24917.2428651326. The cubic root of 620868992 is about 853.1000946756.

The spelling of 620868992 in words is "six hundred twenty million, eight hundred sixty-eight thousand, nine hundred ninety-two".