620521608 has 128 divisors (see below), whose sum is σ = 1892505600. Its totient is φ = 165597696.

The previous prime is 620521597. The next prime is 620521609. The reversal of 620521608 is 806125026.

It is not an unprimeable number, because it can be changed into a prime (620521609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231685 + ... + 234347.

It is an arithmetic number, because the mean of its divisors is an integer number (14785200).

Almost surely, 2^620521608 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 620521608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946252800).

620521608 is an abundant number, since it is smaller than the sum of its proper divisors (1271983992).

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

620521608 is a wasteful number, since it uses less digits than its factorization.

620521608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771 (or 2767 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 620521608 is about 24910.2711346143. The cubic root of 620521608 is about 852.9409582526.

The spelling of 620521608 in words is "six hundred twenty million, five hundred twenty-one thousand, six hundred eight".