620124640 has 72 divisors (see below), whose sum is σ = 1556408952. Its totient is φ = 233441280.

The previous prime is 620124619. The next prime is 620124649. The reversal of 620124640 is 46421026.

620124640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620124649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39535 + ... + 52945.

It is an arithmetic number, because the mean of its divisors is an integer number (21616791).

Almost surely, 2^620124640 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 620124640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778204476).

620124640 is an abundant number, since it is smaller than the sum of its proper divisors (936284312).

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

620124640 is a wasteful number, since it uses less digits than its factorization.

620124640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13460 (or 13435 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 620124640 is about 24902.3019016315. The cubic root of 620124640 is about 852.7590346956.

Adding to 620124640 its reverse (46421026), we get a palindrome (666545666).

The spelling of 620124640 in words is "six hundred twenty million, one hundred twenty-four thousand, six hundred forty".