616995220 has 12 divisors (see below), whose sum is σ = 1295690004. Its totient is φ = 246798080.

The previous prime is 616995173. The next prime is 616995233. The reversal of 616995220 is 22599616.

It can be written as a sum of positive squares in 2 ways, for example, as 268500996 + 348494224 = 16386^2 + 18668^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 15424861 + ... + 15424900.

It is an arithmetic number, because the mean of its divisors is an integer number (107974167).

Almost surely, 2^616995220 is an apocalyptic number.

It is an amenable number.

616995220 is an abundant number, since it is smaller than the sum of its proper divisors (678694784).

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

616995220 is a wasteful number, since it uses less digits than its factorization.

616995220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30849770 (or 30849768 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 616995220 is about 24839.3884787851. The cubic root of 616995220 is about 851.3221499808.

The spelling of 616995220 in words is "six hundred sixteen million, nine hundred ninety-five thousand, two hundred twenty".