2188363856 has 20 divisors (see below), whose sum is σ = 4845663072. Its totient is φ = 937870176.

The previous prime is 2188363841. The next prime is 2188363861. The reversal of 2188363856 is 6583638812.

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, 9769370 + ... + 9769593.

Almost surely, 2^2188363856 is an apocalyptic number.

It is an amenable number.

2188363856 is an abundant number, since it is smaller than the sum of its proper divisors (2657299216).

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

2188363856 is a wasteful number, since it uses less digits than its factorization.

2188363856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19538978 (or 19538972 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 2188363856 is about 46779.9514322108. The cubic root of 2188363856 is about 1298.2943817240.

The spelling of 2188363856 in words is "two billion, one hundred eighty-eight million, three hundred sixty-three thousand, eight hundred fifty-six".