620899308 has 18 divisors (see below), whose sum is σ = 1569495564. Its totient is φ = 206966424.

The previous prime is 620899277. The next prime is 620899387. The reversal of 620899308 is 803998026.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 8623566 + ... + 8623637.

It is an arithmetic number, because the mean of its divisors is an integer number (87194198).

Almost surely, 2^620899308 is an apocalyptic number.

It is an amenable number.

620899308 is an abundant number, since it is smaller than the sum of its proper divisors (948596256).

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

620899308 is a wasteful number, since it uses less digits than its factorization.

620899308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17247213 (or 17247208 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 620899308 is about 24917.8511914651. The cubic root of 620899308 is about 853.1139796024.

The spelling of 620899308 in words is "six hundred twenty million, eight hundred ninety-nine thousand, three hundred eight".