620797816 has 16 divisors (see below), whose sum is σ = 1201544640. Its totient is φ = 300385920.

The previous prime is 620797781. The next prime is 620797819. The reversal of 620797816 is 618797026.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620797819) 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 3 ways as a sum of consecutive naturals, for example, 1251361 + ... + 1251856.

It is an arithmetic number, because the mean of its divisors is an integer number (75096540).

Almost surely, 2^620797816 is an apocalyptic number.

It is an amenable number.

620797816 is a deficient number, since it is larger than the sum of its proper divisors (580746824).

620797816 is a wasteful number, since it uses less digits than its factorization.

620797816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503254 (or 2503250 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 620797816 is about 24915.8145762887. The cubic root of 620797816 is about 853.0674938245.

The spelling of 620797816 in words is "six hundred twenty million, seven hundred ninety-seven thousand, eight hundred sixteen".