616391788 has 12 divisors (see below), whose sum is σ = 1078964712. Its totient is φ = 308116160.

The previous prime is 616391777. The next prime is 616391801. The reversal of 616391788 is 887193616.

616391788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418 + ... + 35113.

It is an arithmetic number, because the mean of its divisors is an integer number (89913726).

Almost surely, 2^616391788 is an apocalyptic number.

It is an amenable number.

616391788 is a deficient number, since it is larger than the sum of its proper divisors (462572924).

616391788 is a wasteful number, since it uses less digits than its factorization.

616391788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39872 (or 39870 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 616391788 is about 24827.2388315737. The cubic root of 616391788 is about 851.0445235227.

The spelling of 616391788 in words is "six hundred sixteen million, three hundred ninety-one thousand, seven hundred eighty-eight".