620285939 has 24 divisors (see below), whose sum is σ = 780721920. Its totient is φ = 482403168.

The previous prime is 620285927. The next prime is 620285969. The reversal of 620285939 is 939582026.

It is not a de Polignac number, because 620285939 - 2⁸ = 620285683 is a prime.

It is a super-2 number, since 2×620285939² = 769509292242223442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620285939.

It is not an unprimeable number, because it can be changed into a prime (620285969) by changing a digit.

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, 65354 + ... + 74240.

It is an arithmetic number, because the mean of its divisors is an integer number (32530080).

Almost surely, 2^620285939 is an apocalyptic number.

620285939 is a deficient number, since it is larger than the sum of its proper divisors (160435981).

620285939 is a wasteful number, since it uses less digits than its factorization.

620285939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979 (or 8966 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 620285939 is about 24905.5403274051. The cubic root of 620285939 is about 852.8329645943.

The spelling of 620285939 in words is "six hundred twenty million, two hundred eighty-five thousand, nine hundred thirty-nine".