620752580 has 72 divisors (see below), whose sum is σ = 1537359768. Its totient is φ = 209889792.

The previous prime is 620752571. The next prime is 620752609. The reversal of 620752580 is 85257026.

It can be written as a sum of positive squares in 4 ways, for example, as 32787076 + 587965504 = 5726^2 + 24248^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 620752580.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67202 + ... + 75878.

It is an arithmetic number, because the mean of its divisors is an integer number (21352219).

Almost surely, 2^620752580 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 620752580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768679884).

620752580 is an abundant number, since it is smaller than the sum of its proper divisors (916607188).

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

620752580 is a wasteful number, since it uses less digits than its factorization.

620752580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8773 (or 8764 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 620752580 is about 24914.9067828880. The cubic root of 620752580 is about 853.0467730157.

The spelling of 620752580 in words is "six hundred twenty million, seven hundred fifty-two thousand, five hundred eighty".