620615636 has 12 divisors (see below), whose sum is σ = 1109185728. Its totient is φ = 303705432.

The previous prime is 620615623. The next prime is 620615659. The reversal of 620615636 is 636516026.

It is a junction number, because it is equal to n+sod(n) for n = 620615596 and 620615605.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1650386 + ... + 1650761.

It is an arithmetic number, because the mean of its divisors is an integer number (92432144).

Almost surely, 2^620615636 is an apocalyptic number.

It is an amenable number.

620615636 is a deficient number, since it is larger than the sum of its proper divisors (488570092).

620615636 is a wasteful number, since it uses less digits than its factorization.

620615636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301198 (or 3301196 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 620615636 is about 24912.1583970558. The cubic root of 620615636 is about 852.9840382898.

The spelling of 620615636 in words is "six hundred twenty million, six hundred fifteen thousand, six hundred thirty-six".