620807056 has 15 divisors (see below), whose sum is σ = 1203006801. Its totient is φ = 310353696.

The previous prime is 620807051. The next prime is 620807069. The reversal of 620807056 is 650708026.

The square root of 620807056 is 24916.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 313856656 + 306950400 = 17716^2 + 17520^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620807051) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 96550 + ... + 102778.

Almost surely, 2^620807056 is an apocalyptic number.

620807056 is the 24916-th square number.

It is an amenable number.

620807056 is a deficient number, since it is larger than the sum of its proper divisors (582199745).

620807056 is an frugal number, since it uses more digits than its factorization.

620807056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12466 (or 6231 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The cubic root of 620807056 is about 853.0717261764.

The spelling of 620807056 in words is "six hundred twenty million, eight hundred seven thousand, fifty-six".