620848640 has 40 divisors (see below), whose sum is σ = 1488587760. Its totient is φ = 248338432.

The previous prime is 620848639. The next prime is 620848649. The reversal of 620848640 is 46848026.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 620848594 and 620848603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620848649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118700 + ... + 123819.

It is an arithmetic number, because the mean of its divisors is an integer number (37214694).

Almost surely, 2^620848640 is an apocalyptic number.

It is an amenable number.

620848640 is an abundant number, since it is smaller than the sum of its proper divisors (867739120).

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

620848640 is an equidigital number, since it uses as much as digits as its factorization.

620848640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242542 (or 242526 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 620848640 is about 24916.8344698920. The cubic root of 620848640 is about 853.0907730726.

The spelling of 620848640 in words is "six hundred twenty million, eight hundred forty-eight thousand, six hundred forty".