620003656 has 16 divisors (see below), whose sum is σ = 1164175740. Its totient is φ = 309556800.

The previous prime is 620003647. The next prime is 620003669. The reversal of 620003656 is 656300026.

It can be written as a sum of positive squares in 2 ways, for example, as 616727556 + 3276100 = 24834^2 + 1810^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49671 + ... + 60886.

Almost surely, 2^620003656 is an apocalyptic number.

It is an amenable number.

620003656 is a deficient number, since it is larger than the sum of its proper divisors (544172084).

620003656 is a wasteful number, since it uses less digits than its factorization.

620003656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111264 (or 111260 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 620003656 is about 24899.8726101159. The cubic root of 620003656 is about 852.7035743884.

It can be divided in two parts, 62000 and 3656, that added together give a palindrome (65656).

The spelling of 620003656 in words is "six hundred twenty million, three thousand, six hundred fifty-six".